It's not a false equivalence. It's not an equivalence at all. You posted a gif that suggested you didn't care where money came from. If someone's giving it, you'd take it. All I did was give you a scenario and ask if you'd take it.
That said, the principle is still the same. OnlyFans isn't as bad as child trafficking, but you doesn't have to be for people to look at and decide that any money produced by it is dirty.