It could be 10 inches deep and I still wouldn't care. I can fly it around 290. It I miss it right, I usually miss in 10 yards right.....same for missing it left. Usually, the rough isn't as long there. Worst case scenario though, on a 490 yard par 4, I bomb it into the rought, I hit my next shot 80 yards and try to get it up and down from around 100.
If I hit in in the fairway, I will make par or better. Usually that translates into a 75 or so. If I'm hitting it well, I'll shoot 70. If I'm hitting it poorly, I'll shoot 80.
That is why courses with trees and hazards (read Medinah) have their place in this world too.
As a pretty good putter, take me to one of these Doak courses with 50 yard fairways and I'll eat them up. Who cares about angle of play when you have sandwedge in your hand.
And I understand that everything I just wrote is what is wrong with the game...but that is the game we are faced with. I'd be an idiot to play it any other way.