Why am I so intent on building an armory I'll never use?

My first time playing PZ was on a multiplayer server with 3 friends. We played for about 5 months before an update trashed our save. We had cleared town by town, establishing elaborate bases in each one but lost the save before I ever saw Louisville.

So I started a solo game and have established my base on the west side of Louisville and am slowly clearing high-value POIs. I've cleared most of the gun shops, army surplus shops, pawn shops, military checkpoints, military housing, and police stations and, therefore have amassed a stockpile of guns and ammo that would make an army general jealous.

I have 18 perfect condition M-16s, 30 M9's, 9 tactical shotguns, and boxes full of all the other random rifles and pistols. But the crown jewels are the ammo boxes. I have 4 crates full of 5.56, 5 crates full of 9mm, and 10 crates of shotgun ammo. AND, I've left dozens and dozens of cartons of ammo behind in all those POIs.

But...why?

I rarely use firearms. Of my thousands and thousands of kills, 99%+ have been with a long blunt. I have 55 long maces built and can build many more. The few times I've used firearms, it went disasterously, with me getting just a handful of kills before being overwhelmed by zombies and having to flee.

So, for you veterans, where do you find firearms most useful or am I just not good?