He was short of the line which was very clear on the reply. If you are short, it doesn’t matter if it was an inch or a mile. It kinda like you wife is pregnant or she isn’t pregnant.
Being that it was fourth down, you can rightly say that the exact spot did not matter if he were an inch short. But it obviously does to fans after that spot was short after other spots were short all night. Why spot it a yard short if it were only a few inches short? It definitely incited mistrust and put an exclamation point on how bad up the refs were throughout the game.