alt Hacker NewsI would absolutely draw a distinction between government enforced censorship and private platforms censoring content.
Where it becomes a larger problem is if the private platform is an effective monopoly; using monopoly power to censor viewpoints would be a bad. Normally we would call a monopoly platform a common carrier and outlaw censorship by them.
The issue is that there are plenty of large companies that are effectively censoring legal views, and making it harder for people to setup alternative platforms that support them. For example, Visa and Mastercard control much of the payment infrastructure used online, and have far stricter rules about the type of content they allow payments for than what many countries actually allow. Same with Paypal to some extent, or Cloudflare, or cloud hosting platforms like AWS.