Earlier quoted context omitted.
We don't need a free speech platform. People need a choice as to how the content they see is moderated. That's what forums used to do, until we collectively decided to just put all the forums on Facebook or Twitter rather than having separate forums for each interest. Everyone thinking "we need free speech on Twitter" has lost the plot, and, as you mentioned, the revealed preference of people who claim they want free…
You are onto something, but companies doing the moderating are doing what they can to ensure that: a) new entrants can't exist ( Parler, Truth.. whatever ) b) the rules are so generic that they ensure given platform can ban whatever And this is why people clamor for simple free speech slogan. If this is how we understand it, then we do need free speech.
Unfortunately, I doubt that we can put the cat back in the bag.