It was never about the tree.
It was about how so many Pokemon fans lost something significant for no apparent reason, only to receive nothing in return
despite even being promised they would receive things in return.
Personally, I believe all dexit did for the Switch era was give Gamefreak opportunities to cut out more content and rush games harder than ever before, only to repackage their missing content for an extra $30-35 as DLC. It literally did nothing else during this era. Competitive is more broken than it ever was within the past several generations, graphics look ugly this time around, the animations are worse than any 3D Pokemon game prior to dexit, sure it made completing the dex is somewhat more appealing, but it could've easily been like Gen 7 where you could use all the existing Pokemon while still just having a regional dex. In regards to playability of metagames, National Dex Anything Goes is virtually unplayable now, yes. That's not because we have too many Pokemon. That's because Gamefreak made many of their stupidest mechanical decisions in the history of the series throughout the Switch generations alone and they've taken a massive toll on the entire premise overall. Dexit also did not give Gamefreak less overall work. It just gave them opportunities to blitz through game after game now to send them out in shorter durations than ever. It's giving Gamefreak more room to maximize their profit by exploiting the trust of the playerbase. I'm sorry to get nasty here but I genuinely cannot see it any other way. The Switch games even have every single Pokemon in the series programmed in them, but with wiped stats in Gen 8, and completed stats in Gen 9. Their priority isn't to make the best game they could, but to make the most money they can get, which right now is by spending less time and money on the resources of one game, and pushing out as many different games as possible.
To me, this is why I believe Scarlet and Violet dropped the way they did, and why Gamefreak has been dodging any promises to spend more time on the games, despite acknowledging their schedules were an issue. It's confirmed by some of Gamefreak's dissatisfied staff through company reviews, that they know Pokemon games will still get a lot of sales no matter what state the game is finalized in, by virtue of being a main series Pokemon game. Thanks to this, a lot of the higher ups in Pokemon don't really care how the final product ends up.
I made this sometime ago and posted it somewhere, but was proud of it so I want to share it somewhere else.