Quote Originally Posted by KillianHawkeye View Post
On the contrary, Shepard can use guns in ME2 such as the Widow and the Claymore, both of which are noted as having so much recoil as to break the arms of a normal human who fires them, and both of which were stated in ME3 as having undergone extensive redesigns to lessen the severity of said recoil. Shep's ability to use these guns is because of the strengthening that came along with her return to life.

And when Miranda and the Illusive Man go on and on about how they brought Shepard back "exactly as she was," they are referring to her mind and personality only. They want Shepard to be the same person who can make the same decisions that they believe will lead humanity and the rest of the galaxy to victory over the Collectors/Reapers.
I was about to say this as well. Shepard is explicitly the only human strong enough to use these guns without breaking his arms.