dahermit, aside from aesthetics, and symbolism, the other issue which has nothing to do with potential mechanical failure is one of potential bias issues with a prosecutor or jury.
How many threads have there been about not removing a magazine disconnect or other safety device from a carry weapon?
The point has been made by quite a few that this could be used by an overzealous prosecutor to paint a defendant as reckless. After all, he removed a safety device!
The odds of this happening are probably about as low as the odds of an individual lock failure. But, for many, it is an added concern.