Maybe because a company like Riot can be held accountable for the poor content of its chats? (in the court of law I'm not sure, but in that of public opinion definitely)
Online chat has been a staple for multiplayer PC games for ages now.
Since when has a company been held accountable on a meaningful scale for what happens in chat? (No doubt in my mind that what’s said in chat is called out especially if users aren’t banned)
Sure you might get statements like X community is toxic, but that normally stems from more problems then just the game chat of said community.
I guess maybe they don't want to be dragged to a congressional hearing where they'd be shown a bunch of screenshots that'll look extra offensive out of context and have to explain to senators why they're not doing more to protect players' mental health from bullying, toxic comments, dehumanizing etc
If nothing else they may be a bit worried about the Chinese government since they're a Tencent subsidiary. There's been some significant pressure on game companies this year.
