I don’t think it’s fair to equate private action with state action. The latter is much more dangerous to freedom

The latter often leverages the former to work around having to legislate things that are unpopular or unconstitutional. A great example is government agencies buying data from data brokers or the Twitter files where the government leaned on Twitter to downrank "wrong" ideas. With the proliferation of powerful near-monopolies - especially in tech - "the market" has little way to work around these kinds of problems, especially in the short term.

I guess my point is that both are dangerous to freedom, and ideally the government would do something to curtail corporate censorship instead of encouraging it. That's the whole idea of a "common carrier"[1].

[1] https://en.wikipedia.org/wiki/Common_carrier

I am not equating the two, I am pointing out the flaw in the logic of viewing each in isolation and rationalizing. Excusing state-level book bans in libraries with "you can just buy it yourself with your money instead" clearly ignores what has been happening in the private sector.

Gov inaction is just as important, especially when it comes to regulating monopolies. Net Neutrality is a similar issue.

“X is worse than Y” is not on its own an argument against “not Y.”