Iron sharpens Iron
No better competition makes you better. The only thing you could say about having to play a tough schedule is that you get pounded on every week and you don't get a chance to catch your breath. However, in practice, if the DL is blowing past or thru the OL then the OL has to get better schemes, players and techniques in place. If DBs are playing tight, then the WR as to learn to deal with it. That way if they play a team that is not as fast, tight and strong as our own team it is a walk in the park. If they do, then they are used to it.
That is why QBs from college have a hard time throwing, cause the DBs are faster and the separation between the DB and WR are tighter, so they don't throw and the QB coach yells at them its not going to get any more open than that.