If celebrities (with their fame, reach and money) can't bother owning their own domains, what chance does a normal guy/gal have? It would be trivial for celebrities to set up their own websites and share whatever stuff they are sharing. At minimum, they can do this in addition to whatever social media they are on.
It is as if we are all becoming lazy and/or many of us don't realize the harm in giving all our info to half a dozen super mega corps. Most of these mega corps aren't even distributed in the world, they are all American (except tiktok) which is another interesting angle.
This is going to happen (already happening?) in the webapps/apps world too. There are so many no-code tools popping up - most will die, the rest will get acquired by the mega corps. Made a great webapp that is successful? Now you are stuck with bubble/airtable/shopify/whatever. I cannot name many no-code tools that lets you export your application to be hosted independently.
I feel like we are on a path where in a few decades, a dozen or two corporations will control every single aspect of our lives - online especially, and probably offline too.