Unfortunately, my belief is that no matter how many content creators jump ship, there will be and endless supply of replacements. The real salt in the wound is that attrition will select for the content that the platforms desire.
That's fine IMO! Content creation is a really top heavy thing anyway -- it seems like anyone can just be replaced with anyone else, but if that were true we wouldn't have such outsized discrepancies between successful creators who are able to monetize and those that can't.
It's a power law distribution. In fact, companies know this so they do sneaky stuff to keep high value creators on their platforms, have heard some stories (try to find some stuff on the Twitch vs Mixer saga).