Let me repeat so there are no misunderstandings. I fully respect the collector's right to keep any gun in pristine condition if that's what he enjoys. My position is that the idea of not using guns as intended doesn't appeal to me.
I guess I have ruined my share of guns. Want specific examples? OK.
Colt Officers Model Target 22 made in 1930, the first year they offered the .22 caliber version. I bought it 25 years ago and it was in about 98% condition. I slapped on the later stocks (I favor that 1950s style) and have fired countless rounds through it both plinking and in silhouette competition. Now it's maybe 90-95% (likely closer to 90) but I have had a Hell of a lot of fun and would do it all over again.
Back in the 1980s when I had an FFL I bought several surplus S&Ws from various distributors. One gun I bought was this 27-2 from the Florida Highway Patrol. Price was $215 and you didn't get to pick or even see the gun. They just sent what they had. What I got was a 100% unfired example. Must have been a detective's gun that was never actually carried or an extra one never issued. Would it be cool to have a 100% 5" nickel M27-2? I guess. But I had more fun shooting and carrying it. No regrets.
In 2003, on the 20th anniversary of a 1983 Model 24-3 that I had been holding in unfired condition for a few years, I took it to the range and put a box through it. Great fun!
There have been others.
You know what started this for me? In 1986 my home was burglarized and all of my guns were stolen, including a couple of very valuable pieces that I had never fired. Now I make it a point in most cases to shoot a gun as soon after buying it as possible.
Collectors are preserving things and things are just not that valuable. Anything that can be obtained with money isn't truly valuable. There is no guarantee at all that whomever winds up with your collection when you are gone will feel the same as you and why should he have the fun of shooting all those cool guns?
Sort of like the big RV with the bumper sticker about spending the kid's inheritance. Let the kids go their own guns.