They may be idealists that don’t reflect a use case I think is reasonable to expect of the average user, but I would also say that it’s very important to have them there, constantly agitating for more and better. They certainly don’t manage to land on achieving all their goals, but they also prevent a more compromising, “I just need to use my stuff now, not in 10 years when you figure out a FOSS implementation” stance from being used to slowly bring even more things further away from FOSS principles in the name of pragmatism.
Parks and libraries, sure, but the rest pretty much all cost money around me. Art spaces are largely monetized, outside of maybe a free night a week, for a limited amount of time before closing that doesn’t include access to all exhibits. Community/rec centers host events and charge money for most of them now, since I guess younger generations aren’t becoming members in large enough numbers to make things self-sustaining otherwise. Churches have the disadvantage of being churches. Sure, you can technically hang out in them for free, so long as you don’t mind constant religious services, which kind of comes with the territory on that one.