I'll throw in for consideration that a 1911 safety locks the slide closed and prevents any possibility that it will be kicked out of battery while holstering. In addition, riding the hammer while reholstering break contact with the grip safety, activating a third barrier to a negligent discharge.
But I'm the guy who spends most of his dryfire with safety and decocker guns practicing up/disengage, down/re-engage without my trigger finger even coming out of register. When practice is free and that easy, the debate around training for safety usage being problematic or a burden seems spurious.