Guess what, in the real NFL LBs have trouble staying with RBs in space and it's not very easy to get a pass rush without blitzing.
You know there are other ways to play man then just picking man 2 deep. You can man up and blitz, you can man up and have a LB spying in the middle, you can be in man and have a DE in the flats, you can have one safety over the middle and one up top. You can bump and run. Use your brains people.