> With all the libertarian millionaires and billionaires swirling around silicon valley

As a libertarian myself - these people are fake libertarians, actually better described as crypto-authoritarians. So called "right" libertarianism is fertile ground for this, as it's based on an axiomatic/reductionist framing of rights wherein when someone violates a precondition, their rights then become irrelevant. The philosophy is supremely attractive to authoritarians who go down its rabbit hole - finding a whole bunch of reasons to reject appeals to other people's rights while convincing themselves they are advocating freedom.

Whereas in reality, the "freedom" they believe in is merely the freedom for themselves to oppress others - witness how these billionaires have chiefly made their money with centralized proprietary web apps/services based around removing choice away from users (at the edge) in favor of "take it or leave it" top-down monolithic offerings, slowly made worse over time (ie enshittification) to extract value after sticky network effects have been achieved.

There are of course exceptions - some use their wealth to attempt to pivot to making libre software. And I'm sure there are many more who become disillusioned with the "freedom" they thought they were making, and merely check out. But as the general rule this is why you don't see much actual support for freedom from the rich Surveillance Valley types.