I totally agree. Not so much about the ribs thing, I'm found (personal experience) that some highly fit horses (Eventers, endurance horses, ESPECIALLY racers,) are always going to have a rib or two on them, because they just have no fat, all muscle. But they should still have filled out withers and butts and by one or two ribs, I mean the-faint-outline-or-one-or-two-when you-stand-at-the-right-angle-in-the-right-light-if-you-squint-and-cross-your fingers. Not deeply sunken emaciated ribs.
But there is no excuse for down right skinny horses. None.