This xkcd comic didn't age well: https://xkcd.com/1357/. Liberals used to cheerfully link to this whenever a conservative was deplatformed. I don't think they'll trot out this xkcd anymore when their favored people are being censored.
I don't agree with Zoom's censorship because I don't agree with China's laws. But I'm not in China, so I have the luxury of expressing my opinion about pretty much anything. Zoom, having operations in China, chose their path. Fine with me, it just means Zoom are lower down my list. That's precisely the scenario depicted in the comic.
But then again, Americans are always conflating the principe of free speech with your first amendment.
Exluding private companies from free speech discussions has no real use when they have monopolies or oligopolies, and your websites keep getting shit down because people are complaining to your ISP about content, or when payment services such as Visa and Mastercard refuse to do business with you.