Eh. Then those advertisers will have to create the content from now on...
Advertisers need to get comfortable with nudity, swearing, and the whole range of non-abusive human behavior. They're almost as bad as the credit card companies with linking morality to commerce.
YouTube is slowly starting to relax, so I'm hoping the shift is happening.
It's okay if the person appearing next to the Big Mac says "fuck".
If not stream they're in channels where the streamer is playing their game, they'll give out DLC codes so that the streamer plays the game longer and make a mint off the back of the viewers. Content created.
A 20 quid DLC key gifted to the streamer will buy you an hour long gameplay ad easily, usually way longer.
There's so many streamers out there they just sort by view count and cherry pick the brand safe ones. They don't need to change their criteria.
As for kick, they seem to be actively ignoring/rejecting these limitations (potentially because they at least partly externally funded by stake (online gambling platform) and kick was a response to most gambling being banned on twitch). I'm not sure how long they can maintain this if they want to stay profitable/attract people to their platform.