It's definitely not all. Of the 2 friends I know in tech plus my brother, I've seen the opposite. Online though? Honestly, as someone who has an account here and an account on another Lemmy instance, I think the biggest issue is age.
I think that there are a lot of older programmers on here that hold some of the same views but are scared of words like "Marxist" and "communism" and it's hard to deprogram that.
It's probably the biggest issue between hex and a large chunk of Lemmy. As a zoomer, I get the shitposting on hexbear, even if I'm still very new here and don't understand every reference. But I can't imagine being older and seeing all of this stuff. I don't think a lot of the younger programmers know or Care about lemmy.
But also yeah sometimes there are dudes that are "brand loyal" and "car guys" on here. But again, old dudes, so who cares what they think about anything?