OP is clearly talking about people he personally knows. I have to say I concur with OP, but that’s just anecdote.
Looking at 2016 voting habits in the Bay Area, Donald Trump got double digit election returns in every county. That’s not even factoring "never Trump" conservatives who voted 3rd party or stayed home. So there are a fair amount of conservatives here. For comparison there are more Trump voters in San Francisco than African Americans.
In case anyone was curious, Wikipedia says Trump received 37,688 votes in (the city and county of) San Francisco, which was 9.3% of the votes counted. The 2010 Census counted 48,870 African Americans in San Francisco, which was 6.1% of the population.
Did you include those who didn't vote, but would vote for Democrats? In other words, double digit election returns are from those who voted, or "votes for Trump as percent of eligible voters"?
Looking at 2016 voting habits in the Bay Area, Donald Trump got double digit election returns in every county. That’s not even factoring "never Trump" conservatives who voted 3rd party or stayed home. So there are a fair amount of conservatives here. For comparison there are more Trump voters in San Francisco than African Americans.