"" A gun made without a safety, then installed? Why don't you install a safety on your revolver? ""
A vehicle made without a winch, then installed? Why don't you install a winch on your Prius? --- Similar rhetorical question, no?
In any case, I may not want a winch on my Prius, but I may install the winch on my F-150. I know, I could buy a Jeep with a winch already installed at the factory, but I want an F-150 with a winch in it.
Likewise I do not want to install a thumb safety on a revolver, but I want it on a Glock. I know that I could buy a striker fired Springfield XD Full Size with a factory installed thumb safety, but what I want is a Glock with a safety on it.
Some do not like winches on their trucks, some do not like safeties on their guns, some do not like mustard on their hamburger.
I personally like winches, safeties and mustard, and I like to put them wherever I want, and one of the many reasons why the USA is so great is that we all have choices to do or do not as we please.
Behold my exercise in free choice:
Which I daily use for this:
.... notice how in addition to the thumb safety I hold my thumb on "the gadget" which works like holding the hammer down on a DA pistol while re-holstering.
Probability of Glock leg =
Chance of: depressing the trigger + thumb safety off + also not pressing on "the gadget with thumb" = 0.00000000001 %
The only way it could be lower is with no round in the chamber.
""I didn't want to have to fumble with a safety when drawing to fire. I don't have to fumble with that safety. My finger goes to trigger, safety is disengaged without thinking about it.""
ok, what would happen if you forget to depress the trigger when you have to fire?
Chance of: needing to fire a shot + not disengaging thumb safety = chance of doing so with a 1911 = (almost) chance of forgetting to depress the trigger itself.
Rifles have safeties, carbines have safeties, the AR15 has a safety, many pistols have safeties. If your firearm has a safety you will not forget to disengage it any more than you will forget to press the trigger.
Put a safety wherever you wish, and don't have a safety where you don't want it, that's it.