Exactly. I sure haven't seen an improvement in community or social ties thanks to facebook. It is funny how Mark Zuckerberg seems to think he is doing something good for the world, at least according to his speeches.
It is more than the source of revenue. For starters, it is the gathering of everyone's private conversations. They are working at an exceptionally disturbing place. I imagine they just convince themselves they are doing good. Humans easily convince themselves of things that benefit them.
I don't think Tesla is any better. It is a continued attempt to move the world in a direction it cannot go. There is no technological way out of the modern world's problems. Personally, I hate computers yet work everyday because I need money. There is no good feeling about what I do.