Why do people who obviously prefer a rules light set of rules play something as rigid and overcomplicated as DnD.

Because the entry barrier is low, a lot of groups playing DnD/Pathfinder, tons of content, it’s mainstream, celebrities play it so the rules are shallowly known to a lot of people.

At least that’s my take.

Wouldn’t you find far more enjoyment in systems lile fate or savage worlds?

Fate is Fudge, and as I mentioned I prefer it over DnD