I view guns as tools. I'm sure there are people who collect many other things that are dangerous. Poisonous snakes for example. Would you say they are nuts? I would. Would I defend their right to do so, you bet.
Seriously, if you are really using guns, you just need few of them and be proficient with them., IMHO.
What's the point to own 10+ rifles, all in different calibers, and none of them zero-ed in? I find every gun is unique, so shooting only few lets you become in tune with the guns you have, and put 4"@50 yards groups from your Glock, 0.5"@100 yards with your rifle.
BTW, shooting competitions such as IPSC and others really help to hone your skills, so if you are faced with a situation you can react and shoot from your muscle memory.
I've seen gun collections, 200+ guns, some exotic calibers, never shot in ages, why would you need it. It is junk. Just donate them to a museum, so that other people can view them. What is the point to lock them up in a gun safe?
The very first time I got a Colt Walker 1850s replica, then went to the range, got the spot at the far end, spent what must have been 20-30 minutes carefully loading black powder, balls and percussion caps, then pointed that monster downrange and pulled the trigger, there was this gigantica KA BOOOMMM, and all those 20 some people with their liitle 9s and 45s and 357s, they just sort of stopped and looked down that way, where the smoke was clearing. And I was thinking, DAMN! People really used these things? Man that is scary.
I can see some collecting...