Cain
Straussian
Carano said something stupid, and a large part of the population responded by saying...
This has been litigated up-thread: Twitter is not real-life. For as many people complained about Gina Carano, vastly more said nothing at all.
Reactionaries responded by saying "actually this is exactly the kind of stupid we like, gimme more" and now she's doing her tour through the right wing press, with promises of future work as some aggrieved cultural icon of the right.
And that's problematic because it encourages obnoxious cultural balkanization. It's probably not a good thing that entertainment is viewed through the lens of heightened tribal politics.
"Cancel culture" is little more than the intersection of free speech and free association.
...
Seems like the "marketplace of ideas" is working fine.
It sounds like you've internalized elements of naive libertarianism. Employers insist the state tramples their right of free association/free-contract when it requires dangerous jobs are made to be less dangerous, or that wages above some minimum must be paid. Of course, people who "agree" to work under such conditions are up against a background of coercion, so their employment is not necessarily free and voluntary.
Mill warned against "the tyranny of prevailing opinion." One of the externalities of your beautiful "markeplace" is that people will be more inclined to falsify their public views, causing them to behave more and more like robotic politicians of yesteryear. Those who are not "canceled" (or not cancelable) will play to the worst people in their tribe (see, for instance, the Republican Party).