Does QB being under center limit you in pass pro

As you know if the QB is in the gun it gives the back time to block a mug linebacker if he comes on a blitz where as if the QB is under center he can't get to him without interfering with the QB or the backer will get there first causing the offense to make a gap call so the lineman blocks the linebacker. Plus if you have the QB in the gun the back can scan the defense better and you can allow him to crossover the QB quicker to block a threat on the side oppostie where he is aligned.

What are your thoughts