Simple does not have to mean featureless. Essentially equating lack of ease with a UI as stupidity is somewhat rude, but worse it's short sighted. Many people have spoken recently about the Github UI - it's much better than what came before in that world, but it can be better, as I'm sure they'd admit.

Your "constant drive to simplify" is better understood as a constant drive to improve. Local maxima are dangerously beguiling, we should always question.