I understand that going against the majority usually is a poor idea, but this time, it's gone too far. I don't intend on droning on about how awful you probably are if you can't beat perish song users, instead, I aim at discussing the key points and problems I've found with all of this.
Firstly, the issue of perish song's alleged "over centralization". While yes, perish song DOES act as a strong force, it is also faulty in that it has many weaknesses, common ones being taunt and raw power; the most effective taunter's of the meta tend to be a mix of both, being Mawile and Aggron, for the most part. Given a tiny bit of speed investment, they outspeed Azu and with only base 50 speed, they are guaranteed to underspeed Meloetta, while at the same time, both are capable of stopping the infamous specs Melo. Taunting a Melo also requires a bit of predicting, as they can come armed with magic coat, but if a correct prediction is made, then it's a near guaranteed 2hko for the Melo.
Secondly, all these posts seem to me as if they are made under the pretense that you'll never see your opponent again, which is completely incorrect. The upper levels of 1v1 (usually ranging from 1300-1400 and up) are very close knit in that you are VERY likely to encounter the person you just battled immediately after battling someone else afterwards. This means that learning sets and counterteaming are very common aspects in the meta, and as such, the surprise factor of your specs Melo is gone, meaning that your opponent can now switch in a staller and pp stall you to death or simply sweep you down, since they know you're not the bulky set.
Third, I want you to visualize what 1v1 would be like without perish song; a much more limited meta, restricting the number of viable non-attacking pokes to little more than Porygon 2 and all the level 1/2 troll sets. As a result, people would turn to the offensive pokes, looking to make them into more defensive, gimmicky type sets that tend to only best an opponent once.
Lastly, banning perish song would only result in a less diverse, black-and-white meta in which players become closer to if not completely capable of creating a perfect team that could handle all threats, because there would be so few usable Pokemon left. A meta is made much more enjoyable when everyone has access to use the sets that they want to use and aren't forced to succumb to the generic sets that everybody uses.
On a side note, I think the requirement for being able to vote on this matter should be raised to 1650, as I was able to reach the required 1600 twice (neither of which were on PS accounts, unfortunately) fairly easily by using teams I had simply thrown together because I thought they'd be fun to use.