I agree with you - which is why I said I don't like the "what if" game. I mean - injuries happen to every team. We played Texas A&M without their top WR and half their secondary missing - so they could say it they would've beat us by more if they had everybody, right? It goes both ways.
The difference IMO is this isn't 1 or 2 guys - it's 4 guys who made up our best player at 3 different positions. Each 1 individually doesn't move the needle, but as a whole, I think they do. I can't remember a year where we lost our 3 best guys at 3 different positions. Probably has happened, but I can't remember it.
As for RB & Citizen/Chaney - we don't have an RB averaging 5.0 ypc right now. Take out BCU, we don't have an RB averaging over 4.2 ypc. That's as pedestrian as it gets. Citizen/Chaney wouldn't have to be elite, or even really good. Somewhere between Good & Above-Average jumps to #1 in this backfield. So I'm assuming at least 1 of them would've been above average. And if Chaney/Citizen weren't going to be above average when healthy, then RB is going to be an issue for a while. We'll always be solid at RB, it'll just be a while before we can consider that position a "strength"