That's a very cynical take. You don't need to have your own speech rights threatened to care about free speech, and many, many people are capable of defending free speech even if their own views aren't being "suppresed".
My political opinions are reasonably mainstream, but I'll happily defend the free speech rights of groups I disagree with (e.g. pro-lifers.)
My political opinions are reasonably mainstream, but I'll happily defend the free speech rights of groups I disagree with (e.g. pro-lifers.)