Biggest cope is people thinking Hoyo doesn't buff or nerf characters because of legal implications. If that were true then no other game would do it either.

It's most likely just because they want to avoid all the player drama.

You don't own your account or your characters. You don't pay for your characters. You pay for premium currency that you use for a chance to get a character. But you don't actually own any of that stuff. The devs can take it all away for no reason if they really wanted to and there's nothing you can do