Put another way: what wasn't censorship when there were a dozen independent media outlets in every city becomes censorship when there are only a dozen or fewer independent media outlets in the whole country. We're not there yet, but that's the direction we're headed.
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.
I’m not making that argument, and I’m not diving into the bottomless pit or what people “feel” is censorship, when it’s appropriate, etc. HN exists by virtue of constructively and carefully applied censorship, with a specific and stated goal to avoid degradation and collapse. Censorship is a tool like any other, none of us should expect to be free from it. Government censorship is a whole other matter, but fortunately the 1st ammendement protects against that.
To the rest, I’ve been hearing the same “if’s” from the same bad actors for decades. After all, when a good argument or cause is absent, out come the slippery slopes. I’m just tired of it. It always seems to come down to a plea for assholes to be given deference, and anything short of that is “censorship”. Please.