Scott in Houston wrote:
Thanks! My only 1911 is the Ruger SR1911, and it's a Series 70. Ruger made real clear in the marketing material that the hammer falling without the trigger being pulled is basically not possible, and they emphasized the stronger firing pin spring to prevent a discharge from just the sheer inertia of the pin moving towards the primer after a drop (no hammer hitting it, but the weight of the pin and its inertia causing the discharge).
I have heard folks say the Series 70's have 'better triggers' because there is less action taking place upon the trigger depression. I wonder how much of that is psychosomatic though. I shot a series 80 recently and thought it felt fantastic. I'm sure there are just many variables besides which design it is that affect the trigger feel.
The leather strap seems to be more of a 'feel good' measure on a holster IMO. (And admitted limited knowledge)
That strap is irrelevant if the trigger is well protected. No trigger pull, no hammer fall, right? Not to mention you still have the safety itself...
To me, almost anything is "possible."

Yes, it is a "feel good" measure to have the strap there, because with any firearm, parts (or the operator) malfunction on occasion. But, as Fernando says, "It's better to look good, than to feel good."
EDIT: In all seriousness, the number of safeties on a firearm is always a personal choice. Some like no safeties, some like the addition of a grip safety to also having a thumb safety, some like the firing pin block, and others like the strap between the hammer and the firing pin. I'm content now that with the FP block, thumb safety, and grip safety, I'm good to go without the strap between the hammer and the FP. It's all just personal decisions.