Even the Colt USMC M45 has a FP safety... as
requested by the users.
Is the "normal" 1911 safe enough? Not so much with the steel FP and standard FP spring. As the Drake Oldham tests shows (
http://dave2.freeshell.org/1911/drop1/drop1.htm) things improve drastically with lighter FPs and stronger FP springs, but a drop has a lot of variables and inertia is a bitch.
IMO there is no good reason in 2023 not to have a FP safety in a service gun.
Baaack in the day, I wrote to Virgil Tripp about the fragility concerns of the double-stack frames for service use:
He said: "I know, we are working on it". Well, it is still an issue.
If someone would make a stronger double stack frame and mags properly sized for 9mm, with a 1911 action, a FP safety (Colt's patent on the S80 FP safety is long expired) that allows for optics mounting, and no grip safety (or a grip module that can easily replace it) probably they would have a lot of customers. Ned's FallArrest[emoji769] hammer or something like that would also furhter improve drop safety.
But the main reason people like the 1911s is the wonderful trigger, and getting a nice sub 4 lbs crisp trigger requires careful fitting of parts and those pesky 0.18-.20" sear hooks that don't leave much margin of safety.