Basically linux is moving from a hobbyist operating system that a single person can reasonably manage in their spare time to an enterprise ish complex monstruosity that requires training and a time investment. Probably because the main Linux sponsors have found that it's the only way to make money with it.

SELinux... systemd... who knows what's coming next.

Let's not forget ipv6, although that's not a linux specific problem.

Edit: went through the discussions and it appears that all defenders of SELinux have used it in a paid professional context where it's justified to have a tight security polities. Hobbyists can't afford that time investment.