I read some article that poo-poo'ed the idea of manual safeties, and in it the author stated that a manual safety can give a person a false sense of safety that leads to complacency and carelessness, thus becoming less safe. There may be some truth to that for some people, but that's my point. It all depends on the person. If you don't feel safe carrying a particular firearm, you may be less likely to carry at all. On the flip side, if you're not willing to train with whatever you do carry, you'll be less effective with it. A person needs to find a gun they're confident in, train for proficiency, and carry on.