I have the same thoughts as you. Games that are made for fun, of course, will be more exciting than those made for income, until now there has been no Play To Earn Game that is truly stable for its players. there was always inflation until they left the project.
Building the sustainable economic might take the time. The problem must on that thing that makes the game can't sustain for long term. I have seen so many play to earn games have dead caused by such thing. It needs the time for the developers to make experiment to make sure if it can create a formula that will make play to earn mechanism can be very sustain for long term. This will be good for people too