This community is diverse. It's just really in fashion today to be against capitalism and the rich. Marxism is the answer apparently.
The interesting thing to me isn't this community specifically, it's that all the prosperity that we (here anyways, for the most part) are enjoying, all the technological achievements, the lifting of billions of people from poverty ( https://ourworldindata.org/extreme-poverty-in-brief ), elimination of many diseases, increased lifespan, were mostly achieved under some version of capitalism.
It's not that there aren't problems (lots) and it's not that the widening gap between the very rich and everyone else isn't a concern but the simple narratives are also wrong.
Capitalism speeds things up but its not the cause of innovation. Plenty of invention happens under other types of economic structures