Imagine wasting the 8th pick of the draft on a check down 3rd down rb who too small to break tackles or run between the tackleswhile 3rd round Kareem Hunt leading the league in yards from scrimmage
I get what you're saying but you're missing the picture.
If Hunt and McCaffrey switched places, Hunt's not leading the league in yards from scrimmage and McCaffrey probably doesn't look as ordinary as he has so far. Same thing with Fournette, Cook, Kamara any of these nikkas, they're in better situations.