If we can actually have a PoS solution, why not explore that (and i know we are but i am responding to your question) instead and actually contribute to growth solution.
It's a matter of which one are you sacrificing for scalability and the energy consumption. IMO if you do believe that PoS is the future, then you can make a fork and encourage others to do so. I believe some people already do this but I don't know which one has enough support. In the end it lacks incentive and the solution is centralized, leaving some users to trust the validators without enough control.