Aye, those things are certainly problematic. I think that people disturbed by those things need to consider directing their outrage and effort at the causes of those problems, and solutions.

Tech people who can afford commutes are not the cause of poor public transit, they just serve to highlight it. Upper-middle class tech workers are not the reason that there are so many homeless in SF, they just provide start contrast that makes the homeless problem highly visible.

Getting rid of tech people so that these problems are not as apparent is not a well considered solution.