I've never understood how so many tech workers see themselves as broadly left-wing, while at the same time gentrifying entire cities, spending their life's work

I've never understood how so many tech workers see themselves as broadly left-wing, while at the same time gentrifying entire cities, spending their life's work growing and optimizing the fortunes of the wealthiest individuals in the world, and increasing the tools of surveillance on the population and competition between the rest of the workers.