If they learned that they have awful coworkers, they can quit again.

I just don't get the sense of entitlement many people seem to have.

I agree that some of radical pro-WFH people might seem entitled, but I think in reality they just too fed up with open-spaces and commute and see pandemic as their last chance to normalize WFH across the industry. Also, I honestly don't see why it is such a big deal to let every team decide how they want to work.

There seem to be companies that embrace WFH, so if I was in that situation, I would strive to become employed at such a company.