Take the example of me, with my weight of 68 kg and I am well physically developed, but I will never make it with two or three opponents, weighing a hundred kg, not because I'm afraid it's just beyond the physical possibilities for me, although I was engaged in melee combat with an instructor that trains special forces soldiers.
Having a weapon in my case a knife, I will be able to resist such enemies, even with weapons. These skills I got spending a lot of time and effort.
Since the completion of my training it's been a lot of years, a weapon I did not use even once, although I have it almost always.
No fear that I will attack I don't, idiots do not consider myself too.The weapon is just an amplifier of my physical and fighting qualities, and that's all.
Probably you have never beaten just so, and I sometimes, just for the fact that my future wife was living with me in one area, and I dared to go there.