Rodgers, Rivers, and Romo, pretty much.
We've discussed the Rodgers situation. Rodgers would have been a good/great whether he started day one, sat a yr, sat 3yrs. Sitting 3 yrs didn't make him great.
Rivers sat 2 yrs. He was drafted not to be groomed. He was drafted to take over Brees job. He wasn't a successor, he was the competition. Brees started playing really and forced Rivers to stay on the bench.
Romo wasn't even drafted. He wasn't brought in to be groomed. He was giving an opportunity and ran with it.
And how does drafting a QB to sit behind Brees and be groomed to start after he leaves waste our window of opportunity with Brees?
Really? is this a question? Using a draft pick, especiallly a high draft, takes away from drafting surrounding players to improve the team. You build a good team through the draft.