Maybe the answer is that only people who are already wealthy can become indie game devs? That would explain why they all seem nice (it's much easier to act that way when you're financially secure) and why the community around them hates them.
Nah. Some of them get comfortable financially after they ship their game, but almost none of them were wealthy while making the game. It's common for devs to live in their parent's basement during that time, or off of money that they saved in jobs for the years or decades prior.