Silicon Valley in either the narrow geographic sense or the sense of the SF Bay Area tech industry has strong faction in the center-right “identity politics plus neoliberal economics” camp that anchors the right wing of the Democratic Party, as well as the right-libertarian, and technocratic right-authoritarian factions. The broader SF Bay Area has a strong (for the US, at least) faction on the center-left (democratic socialists, in the DSA sense if not anything you'd recognize as such eslewhere) and a few visible, though insignificant, groups on the actual left, as well as enormous or in the previously mentioned center-right group.
In Silicon Valley (in either sense), the two right-wing factions tend to point to examples of the powerful center-right group in Silicon Valley as evidence that Silicon Valley is a hard-left monoculture, ignoring both their own prominence and that the faction they are pointing to isn't even a left-wing faction.
Legend ≠ fact