Sure, but it depends on how you (and the people of the future) view Patreon. It's true that Patreon does not owe anyone a platform, but neither does Facebook, or Amazon, or privately owned bank or ISP or mobile network operator. And you wouldn't really view an ISP or a bank just as "somebody, who sells you a service", right? There's only so much alternative when you choose an ISP in most of the regions, and pretty much no alternative when you "choose" Facebook. In fact, even if I don't want to have any business whatsoever with the banks, I can't avoid it. My employer just won't pay me in cash. And in some countries you won't be able to pay in cash for most services either.

And, by the way, although I'm more fond of thinking of Patreon as "just a guy, who sells a service" than as a necessity, there's not so much of an alternative for it either. AFAIK.