Some how, I don't think safety was their biggest concern, such as stability, binary forms, *really* having to arm it 99.94% of the time for it to go off, etc.
Reminds me of the weapons officer for the Hiroshima destined bomb. The day before, he saw some B-29s crash on takeoff, and figured he'd change the plan from arming the bomb before it was loaded, to arming it in flight.
He had the unarmed bomb loaded, and practiced arming and disarming the bomb while it was in the closed bomb bay.
BTTT