That's technically correct, but it doesn't get at the core of the concept. If you read the original arguments in favor of freedom of speech, you'll see they don't focus on the rights of the speaker as much as the rights of the listener. John Milton, Thomas Paine, and John Stuart Mill all made the point (in various ways) that every time you stop someone from saying or publishing an idea, you are also preventing others who want to hear or read that idea from doing so. In addition, censorship requires delegating a censor. Effectively, that means you are letting someone else decide what you're allowed to read and hear. I don't know about everyone else, but there is no government body or private company that I trust with that power. Disclaimers, warnings, and age verification steps are fine, but memory-holing ideas? No thank you.
In the case of Patreon, there is a man who people want to give money to. He wants to accept that money. There is no criminal activity on either side of the transaction. Yet Patreon is preventing these people from doing what they want because Patreon dislikes one paragraph of the man's boorish utterances. This is in direct contradiction to their stated policy (where the person has to endanger the safety of others) and there's a suspicious amount of partisan bias in the application of these policies.
Patreon isn't the first company to behave this way, just the most recent. These actions increase political polarization, erode public trust in institutions and companies, and confirm the persecution complexes of many on the ends of the political spectrum. I'm sure the people in charge of these platforms feel like they're doing the right thing, but I think they are mistaken.