I understand the concept fully, it's just not my thing.
I have only one unfired gun in my collection right now -- and that is simply the result of an oversight on my part (and a lack of time)! I will take care of that very soon.
I have a fair number of guns, but each of them have been purchased with the idea of using them. If they don't get used, and don't have a real potential for getting used, I do tend to sell them. For example, I have a Thompson Contender that I have fired a couple times at the range. I keep it because I think I may use it for some handgun hunting one day. Maybe I won't, but I keep telling myself that!