You're not wrong, but MMOs have been enshittifying the gaming experience by selling in game items in a shop for decades. Many even have player trading systems which inevitably create a real money black market for the game. While most don't legitimise this in the way blockchain games do, there's no technological reason they couldn't, only legislative ones.

The only thing the "blockchain" part actually does is allow you to add another buzzword to your project and company, as well as make all of this cost a lot more electricity.