And if some people treat their Patreon subscription like others treat their gym-memberships, that is not your concern. How other people spend their money is up to them, no matter how wasteful you think it is.
Sure, but I can make fun of them, that's my prerogative.
To be fair, you are right about Patreon on paper, but in reality most people think of it as an exchange of money for privilege. Getting exclusive content, getting time-gated content first.
You could even say that the way Patreon handles this is just due to legal reasons, because no one can sue or demand their money back, if it is all treated like a patronage and not an actual deal where you exchange one good for another.
It's like with a lot of video game companies, they want to basically loan us the right to play their games, but we still believe we buy the games and own them afterwards, and sometimes both views clash and depending on where (due to different laws in different countries) and how it happens, either the company or the gamers win.