I'd argue that DVCS is unintuitive as a concept and Git just spawns from that. If you know graph theory and understand concepts behind DVCS and asynchronous workflows, Git just isn't hard, but that's minority, including actual developers.

Switching Git to Mercurial, or pretty much any other actual DVCS ain't going to make life of artist or someone tech-clueless any better, because while UI might be improved they still don't know what exactly they are doing or why