Personally, I do not agree with Finchinator and others who have the same view as him that the pro-Tera Blast supect camp must prove that Tera Blast is broken for a suspect to proceed. The tiering framework does indicate that an element can be acted on if broken, uncompetitive, and/or unhealthy, and I shall argue that Tera Blast is both unhealthy, and to an extent, uncompetitive.
Many Pokemon are specifically designed to have limited powerful coverage options as a natural balancer of their kits, and I believe Tera Blast giving any Pokemon strong coverage is inherently unhealthy since this goes against that. Pre-Gen 8, Hidden Power was used similarly to snipe 2x or 4x weak targets, but it only had 60 BP, making it more managable than Tera Blast with Hidden Power Ice often bouncing off of something like Gliscor if its user didn't invest in Special Attack. Since Tera Blast has 80 Base Power and gets STAB if you Terastalize, it has effectively 120 BP, making it much more powerful than Hidden Power, which was a fair and balanced move due to the low BP. Yeah, you have to commit your Tera and a moveslot, but Tera Blast is quite often worth it
Additionally, Tera Blast lets the user mindgame the opponent by baiting out a Tera just by throwing out an unTerastalized Tera Blast to force your opponent to wonder whether you actually have the right Tera Type but just misclicked, which forces your opponent to consider the option even if it was just a bluff. This was alluded to by Ausma who indicated that Tera Blast can give the user a positional advantage in game sequencing by forcing your opponent to play cautiously in case of you having a Tera Blast sweeper. I get that with metagame knowledge that this positional advantage is made less, but it is very difficult to reasonably ensure that you can prepare for most Tera Blast coverage given that there are so many mons for which a Tera Blast set is viable even if it isn't the best set. I believe this unreasonably increases the demand on the builder to account for the amount of variance in SV OU, which is one of the reasons Palafin wasn't freed to OU since the format had so many threats to account for, and Tera Blast contributes to this problem. While Ausma argues that Tera Blast is unintuitively broken, I straight up believe it is just unhealthy and uncompetitive and that that is what the pro-ban camp should focus on if it hopes for a consensus favoring our side to be reached.
Another reason why the pro-ban Tera Blast camp shouldn't have to prove that Tera Blast is broken is that earlier in this generation, the SV OU Council banned Sleep moves in general after there was a fuss about Darkrai, Iron Valiant, and Lilligant-Hisui in the high ladder using inaccurate moves to fish for a Sleep that would invalidate a check and give them more opportunites to sweep. 'Cause of the low accuracy and the high power level of SV OU, failing to get off that crucial Sleep could result in the user getting KOed, but top players were still abusing that due to how high the reward was for using them given it forced their opponents into very linear play patterns due to the threat of Sleep. Sleep moves were banned for being uncompetitive rather than straight up broken with their ability to invalidate checks and contribute to sweeps and the same somewhat applies to Tera Blast since Pokemon such as Kyurem and Kingambit often change their offensive profiles entirely with Tera Blast, which is a point Shaymin Sky has made in the past in that rather than 16 centralizing threats, Tera and Tera Blast makes it so that there are more like 48 centralizing threats due to what the Terastal mechanic encourages, and since banning Terastal is now completely off the table, limiting Tera Blast is the only avenue by which we can limit the high variance/somewhat uncompetitive nature of SV OU.
Additionally, an item such as King's Rock was not broken but caused certain mons such as Cloyster and Weavile to be unreasonably consistent alongside them being items solely designed to hax targets, which is why it was banned. This is another argument why given that Sleep moves and King's Rock weren't problematic on all Pokemon or even a large portion of OU-viable mons but were banned anyway Tera Blast is worth suspecting. Kyurem and Kingambit being able to deep six checks (Tera Fire, Electric, or Ground for Kyurem and Fairy and Flying for Kingambit) with Tera Blast is uncompetitive since the move lets them snipe anything the user wants to target at the cost of their Tera and dedicating a moveslot to Tera, which is often worth it to set up a sweep or easily break a crucial part of the opponent's core with it being often out of your opponent's hands given there are only so many Tera Types you can account on any given team, which increases the match-up fishiness of the tier and doesn't necessarily promote skill with the very wide breadth of threats and coverage to account for.
Having said that, a Tera Blast suspect can only happen if the requisite community support is there, and we're nowhere near that point right now with support for acting on Tera Blast decreasing over time. It's not that the OU Council is silencing the pro-Tera Blast suspect camp as some users suggest but that the support was never there to begin with with only a very loud minority of the playerbase calling for it. Survey scores for competitiveness still only being at a 7 shows that there's still work to do on SV OU, and with no single mon having the support for a suspect test, we should articulate a clear case on why a Tera Blast suspect is worth pursuing based on previous precedent although said precedents involved quickbans rather than suspect tests of more problematic elements.