You're in pretty dangerous territory when you start to justify censorship because the right people are getting censored. Censors, be they government or not, never think they're censoring the wrong people, they always think they're doing the right thing.

Also, if media and network consolidation make non-government censorship as powerful as government censorship, and the "physicists, doctors, artists, etc making the same complaints," then it's probably too late to do much about it. It's much better to nip the problem in the bud, and prevent the infrastructure of private censorship from getting too developed.

Think of it this way: if you give too much power to good people in government, then when some crazy fucker like Donald Trump comes along, he can do a lot more harm because he has all the tools and precedents he needs to fuck things up, handed to him ready-made. It's the same for power generally.