There's a few historical reasons for why git was considered complicated. One of them is that it was complicated. The people who started using git very early on in order to work on the kernel really had to learn a very rough set of scripts to make everything work. All the effort had been on making the core technology work and very little on making it easy or obvious.

I don't think I'm unusual in preferring my laptop to be thin and light.

In my opinion MS is a lot better at making money than it is at making good operating systems.

The Linux philosophy is "laugh in the face of danger". Oops. Wrong one. "Do it yourself". That's it.

Avoiding complexity reduces bugs.

The complaints I've had is that GitHub as a development platform - making commits, pull requests, keeping track of issues etc - doesn't work very well at all. It's not even close, not for something like the kernel. It's much too limited.

I'd argue that everybody wants to do something that matters, and the fact that Linux has had a huge impact on the tech market and is used virtually everywhere is obviously very personally satisfying. I think programming is fun, and the community around the kernel is great, but a project has to be relevant too.