If you carry you have to be ready. Rarely are you going to have time to rack a slide in a attack a) your attacker has there weapon out already b) you are in physical activity with them c) there are multiple attacker's. All these even if you practice highly unlikely your going to pull it off. And honestly that's why striker fired pistols are so popular and for me the only pistol I have with a safety is my 1911 and I train drawing and deactivate the safety all the time now I don't carry my 1911 it is a home gun and for the range I carry a glock 36 most of the time with a glock 23 and a m&p shield as others that I rotate for carry no safety on any of those and always ready...