I do not care for Glocks. However, it has nothing to do with them not having a safety. All firearms have a safety. The safety is the brain of the person holding and using the gun. The gun I carry most is a Kahr .40 S&W which has a striker system like a Glock . All you have to do is learn and practice off target,off trigger, the same as if your gun had a safety. The second it takes to remove the safety could be the difference between life and death.
When you are up to your butt in alligators, it is hard to remember your intent was to drain the swamp. Stay focused!