YouTube, Adsense, PayPal, eBay... the list is long and stories are plenty.
Use platform for what it’s good for and have plan B always ready and active
Obviously it's better if you haven't trusted 100% of your business to a platform you don't control. But for some businesses (such as many youtubers) the choice is either do that or don't have a business (since that's the only place with a large enough audience). In such a case it can make sense to do so.
There is always plan B.
Google of course prefer 100% dependence on their platforms.
For most of them there isn't. They might have seperate portals which they earn money from, but the business still goes poof fast if they get banned from youtube. Without publishing on youtube they won't reach enough of an audience to have a sustainable business.
Twitch alleviates this somewhat for some youtubers. But we don't have to go far back in time to consider an era before that existed.
Of course, how you ever get remotely famous or established in the first place if the content you create is remotely vulnerable to false copyright claims is another question entirely...
Patreon unfortunately can also not be trusted as they will dedcided privately what they accept and what they shutdown.
The solution is videos hosted on a service that the artist controls, with a donation option that the creator also controls directly.
It is a hard problem to solve. I would not know what for example Jim Sterling would do if he got blocked on patreon, as all his videos has multiple false copyright claims to them. I know Linus tech tips (an other large youtube creator) has created their own platform as a massive Plan B, but that relies on payment services which could at any time destroy that option.