The DA feature was not chosen for any safety reason, it was accepted because it gave a second strike capability to (hopefully) fire a dud round. That was a much higher concern in the latter 1930s than any safety considerations.
To me that would be the last consideration when choosing a firearm. I have put tens of thousands of rounds trough firearms of all sorts and have never had or seen a misfire using modern ammo. PS Apart form .22 rimfire.