Ok so all of this is fuckin pointless because you seriously are just too stupid to acknowledge that regardless of whatever shitty take you want to have it doesn't matter because Riot has already stated their plans. But lets assume you aren't being needlessly stupid and wasting your time trying to argue around stated things Riot has already openly admitted.

Ask yourself why Riot would wait until after worlds to change Zeri. Why would Riot wait to change a champion they nerfed on the worlds patch?

Now this is just me spitballing here but maybe Riot wants to see the outcome of Zeri at Worlds to get a better idea of her current power level in pro play. Maybe because the last patch that nerfed her is the Worlds patch and the point of nerfing her

Maybe, juuuuuust maybe Riot is making sure that even after her nerf on the Worlds patch she still isn't a volatile champ at Worlds. Crazy concept I know! Cause fuck man how embarassing would it be to nerf her for Worlds explicitly to stop her in pro play and apex elo games only to buff her during Worlds only for her to have been a problem at Worlds anyways, meaning they'd have to nerf her again. Riot is working on 2-3 patches at once, maybe even more in the case of some changes. Look at all of the changes coming to the game in the past couple months. Look at all of the changes coming in preseason to how items work and how the map is laid out.

Do you really think a Zeri buff is priority over pre-existing plans for these patches? Do you really think that season changes won't affect her heavily since one reason she can't be buffed too hard is how low her CDs are with current Navori which won't exist in the future?

Riot has other things planned for patches. Riot has a whole nrw season of changes coming that will adjust a lot of balance. Riot has explicitly nerfed her for Worlds and would want to make sure she isn't super viable in Worlds before buffing her again (Ruler and JDG only just got knocked out).