I've always found the knees hitting the seat thing an amazing variation of human anatomy. My wife is 6' tall with long legs and will have 3 or more inches to sp

I've always found the knees hitting the seat thing an amazing variation of human anatomy. My wife is 6' tall with long legs and will have 3 or more inches to spare on leg room, while I know people shorter than 5'10" who constantly complain about their knees hitting the seat in front of them. It does seem like truly exceptionally tall people would have a reasonable disability accommodation claim to be put in premium economy if they really can't fit their legs in.