If one's confidence is based not on skill and abilities but by how much excess stuff you can carry around, I would suggest that is a not an upside. I will have the same confidence and act with the same necessary aggressiveness if I am armed with a mini-gun or a snub revolver. My tactics might change quite a bit, but that is about it. Personally I would think carrying around oh, maybe 5,000 rounds would get to be a bit tiring and maybe even slow a person down, so maybe there is a downside?? Again, we all compromise on what we carry based on what we think we will need.