Earlier quoted context omitted.
I think many people do realise it, and feel like it's a worthwhile risk. The cost of avoiding a hypothetical future in which I'm censored is accepting the real damage they're doing in the here and now. And also, I may end up censored anyway for other reasons. Tolerating Milo et al. isn't really a bulwark protecting me.
The far right are only pro-free speech for as long as it benefits them. Historically, whenever they or similar authoritarians have taken power, basic right such as free speech and the right to assemble are the very first things to be restricted. They are hypocrites in the extreme. They only want free speech for themselves, and no one else.
As for whether free speech benefits those in the far right. Sure maybe it does but it also benefits everybody.