McVay always does this with rookie HBs. He doesn't trust them to handle the passing game assignments, and he doesn't want to tip the other team to run based on personnel.
Well, that sounds like a coaching problem to me. Or maybe they aren't drafting the smartest players. Because there are plenty of teams that start rookies who have phenomenal years at the HB position. Even the TE position is a headscratcher.
I feel it puts the team in a bind. Every player has bad games, but when you have no one to come in behind them when their day is off you put your team in a bad position. Do I think Hunter Fumbles on the one yard line? I don't, I think that's a Williams special.