Same Face Syndrome

I would say 99.999% of manga suffer from Same Face Syndrome. It's an epidemic that will never be rectified because artists are lazy. But it's not their fault. Why draw something that most readers won't give a crap about? With the world so ADD nowadays, readers take what, ten, fifteen seconds to look at a page? It's less time consuming to swap your characters' hair like wigs.

"You guys, I'm having a bit of an identity crisis here. Can somebody draw themselves a mustache?"

What amazes me is everything else is fine. Beautiful even. The backgrounds are detailed down to every shaded window, the animals are drawn to near perfect anatomy, and if the elderly aren't regular faces with a line underneath each eye, they've got all the wrinkles and sagging skin. So the artist is capable of drawing diverse faces other than different combinations of eyes and eyebrows. What boggles my mind is when the artist chooses to make their main cast practically the same. Who cares about background characters and throwaway characters, but the main cast?