I think your point about paying for museums touches on part of the issue.

It does cost to distribute art/entertainment. I have no problem paying for that.

It's that over the years distributors have gotten greedy (ads on a paid service, like cable did? Fuck you), and are telling us "buying ain't owning" by removing things we've paid for.

Art being for everyone, well, while I agree on an abstract level, there's a whole discussion we could have about that, starting with the range of "art" that's produced, from the mass-appeal art (so more base, simpler, becuae that has the broadest appeal), to the more niche.

At one time artists were supported by a patron (and now we have things like Patreon).

Then we have the players who get into the "art" business as an opportunity - consider things like the explosion of popular music in the 50's (that sounded similar courtesy of things like Rockola) and today's Autotuned music.

It's a big bucket of questions, ideas and concerns, and while philosophical me agrees with the basic premise of the value of art, the realist recognizes that art has a tangible value too, or people wouldn't be willing to pay for it.