The "what did they do in the pros" argument is maybe about the weakest and irrelevant argument for why someone sucks as anything.
It's very simple see. Just because someone was a very good or great college football player, and didn't really make it or do well in the pros then means that they sucked as a college football player.
Of course you'll probably come back and say..."But that's not what I was saying or implying."
I wonder if U "fans" will still think the same way when Alex Smith is officially deemed one of the biggest busts in draft history.