>Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
I think it is reasonable to assume that when the vast majority of Americans refer to "free speech" they are making reference to the Bill of Rights and the First amendment. Unfortunately, most people don't seem to understand that, with regards to speech, the 1st amendment is only about preventing government from curtailing speech. It doesn't say any private individual or company has to allow all speech.
I don't think anyone claimed that a government protection was being violated. It's you that saw "free speech" and apparently assumed that meant the first amendment and the US government.
There are ways in which I can legally attempt to suppress the speech of others, for example I could threaten to evict guests from my home if they bring up certain topics. That is clearly an action which goes against the principles of freedom of speech but it is not a violation of any of the protections provided by the US government.
Whether such an action on my part is morally justified will be highly context dependent. For example, perhaps I don't want certain topics discussed in front of my children in my own home?
Suppressing Joe Rogan is an organization expressing their free speech rights. Or perhaps you think organizations don’t have the right to control what is on their platform?
Article 19 of the Universal Declaration of Human Rights:
"Everyone has the right to freedom of opinion and expression; this right includes freedom to hold opinions without interference and to seek, receive and impart information and ideas through any media and regardless of frontiers."
