Well. I own more than 2, or 3… Guns have many purposes. You may not understand the importance of the differences.
An avid hunter may hunt different animals. While a shotgun, rifle, and pistol could serve the purpose, a much larger variety is usually used. Almost like golf clubs. Different weapons will have different capabilities, and therefore be better for different prey. Quails, and Bears require different weapons….
When I’ve lived in really bad spots of town, I preferred a gun in each room (no kids at,the time,in the apts.) And I had a shotgun by my couch, that I would answer the door with.
I felt safe that way. I lived in those places many years. People just knew there were easier targets…
Is it a sign of mental illness? To me, it was preparedness. Guns are tools, and people who are more likely to require certain tools have more of them.
I’ll alot that there is a portion of people who shouldn’t own guns, but own a lot, and probably won’t use them responsibly, or, with care… But very basic/reasonable hurdles must be overcome to even start to control those who stockpile weapons, with no oversight.