Why is the game dev space so uninviting?

As I've had the chance to learn more about the game dev space, and looked here on Reddit and other places online I've found a lot of angry people and negative feedback. Coming from the software engineering space where I see so many positive supportive people I was pretty shocked to see this.

It seems like making games should be fun, and I don't see why people aren't happy for new people jumping in and building games.

One of the most negative people I've seen is Jonathan Blow, the guy who made Braid - he seems to be on the attack all the time. Didn't he make good money with his games? Why are people like him so discouraging of welcoming new people to the space.

As a new game dev myself I've decided not to share or ask questions because from what I've seen so far, this community can be so cruel to new people getting started. I hope that changes, I've paid a lot of money for games over the course of my life, but now have a pretty solid list of people I'd never buy games from given how they act.

I wish everyone all the best and really do hope this community is more welcoming in the future!