A lot of people have shot themselves with them. I personally won’t holster one with a round chambered when wearing the holster. Holster off my body, holster the gun, put holster on or holster with an empty chamber, which is what I do when carrying one for deer, pigs, rattlesnakes, etc.
It makes me really nervous to point a loaded gun with a relatively short, five-pound trigger at my body and holster It when something like loose clothing could set it off. Maybe that’s the Darwinian thing you reference?
I personally think they could be designed better to accommodate holstering. Maybe one of those devices that go on back of the slide to keep the firing pin from coming back would be helpful.
In reference to the first part I highlighted in bold; It should make you nervous to point a loaded gun at yourself. In general, it is not recommended, and if you are doing it when holstering your firearm, you have some issues with both training and equipment that need worked out. I am not being sarcastic, I am being dead serious.
I wear a Glock 17 most days, shown here, in this holster, and it does not point at my body.
Here is a pic of a 1911 holster, You can see that the holster does not point at the body.
Same here, the holsters don't point at the body.
Now in regards to the second part, about a device, there is one. It blocks the striker. You place your thumb on the back of the slide. The striker control device blocks the rearward motion of the striker, which blocks movement of the trigger bar and prevents the trigger from moving.
Here is a link.
https://taudevgroup.myshopify.com/products/striker-control-deviceThe device cannot replace proper weapons handling, however if it is something that you may find beneficial, you can build it into your re-holstering technique, as an added safety measure.
CHEERS!