When people build their own platforms, the censorship minded mobs go after their upstream providers, like aws and visa. So this "you can always build your own" is not 100% true.
Also, mobs do go after you for your online speech, so the possibility of a platform that keeps your speech up does not preclude the possibility (and fact) of censorship
Also, mobs do go after you for your online speech, so the possibility of a platform that keeps your speech up does not preclude the possibility (and fact) of censorship