Do we need publicly-owned social networks to escape Silicon Valley?

I was reading a biography about PBS and Mister Rogers - and it's fascinating to see the high hopes everyone had for a non-commercial TV channel. TV was a new medium, and the idea was to create high-quality alternative programming - specifically to address problems they were seeing.

if not, then we at least need indigenous social networks, rather than ones controlled by foreign states. Dependency on the US internet was cool for a long while but its national security priority for every country to run their own, walled off internet, ideally one which is nonetheless interoperable with others.