I really detest this line of thought. What good are the concept of human rights when people declare that private companies by definition cannot infringe on them?
I don't think it is unreasonable to hold "the government" to a different standard than "other people" or "corporations".
There is nuance to this, as there is with absolutely everything, but "monopoly on violence" is a big distinction.
Understandable, but what happens when rights conflict in the other direction? Why doesn't my ISP's right to block access to parts of the Web end where my right to consume information begins? Why do we place more importance on the 'rights' of an abstract non-living corporation above the rights of actual citizens?
> "what a company allows or doesn't allow on its platform is compelled speech"
Would this make things like Net Neutrality and public broadcasting laws likewise unconstitutional? The government always requires this for several things deemed to be in the public square. I see no flaw in bringing parts of the Internet's infrastructure into it.
> "a baker has the right to censor you"
Scale and scope matters. We're not talking about a mom and pop shop choosing not to do business with you, we're talking about multi-million and multi-billion dollar companies.
For the same reason that a restaurant refusing service to you is not a violation of your right to food. You can still consume information without a contract under a specific ISP.
>Why do we place more importance on the 'rights' of an abstract non-living corporation above the rights of actual citizens?
We don't. The rights that protect corporations are actually protecting the people involved with and interacting with that corporation. Rights don't only exist exclusively for individuals, they can be expressed by groups and protect people in aggregate. The freedom of religion, for instance, would be meaningless if it only applied to the "abstract, non-living" concept of "religion," or could only be exercised by individuals, and not religious organizations.
These are a trade the provider makes with the government to abide by certain rules such as content neutrality and in exchange get many advantages from the government. For example, common carriers are exempt from state and local barriers to entry and receive universal access subsidies. While I wish US ISPs were common carriers they currently are not.