I am assuming that you are addressing your question to me, Blue Ghost.
Call it a case of liking another combat system that I was using long before I got into Traveller, and decided that it worked very well for simulating small-scale personal combat.
Interesting. I guess it depends on when you were playing too. In the 80s there wasn't much else (maybe two or other three systems to draw from).
You'll have to pardon my question, because when I first got into the game there really weren't too many other systems for ranged personal combat. I'm not sure if it was you or not, but someone also not only used a different system, but also kept out space/starship combat and energy weapons, which kind of strips the game down to some bare essentials.