I thought that the "safe" trigger was designed to prevent an AD if the weapon were to be dropped with enough force that inertia would activate a standard trigger. This isn't a safety which will prevent or block the firing mechanism (that also could fail).

I automatically sweep any semi-auto as I draw it out of the holster before my finger is even near the trigger guard as I was taught 45 years ago. Also DA revolvers with transfer bars were considered the only safe gun to carry back then.