If you do only one thing you will do it in so many ways and think about it from so many angles that you may eventually lose the thrill and excitement.
Shooting in many regards is a relatively simple activity, and it takes extra creativity and difficulty challenges just to spice it up.
It is only one hobby, and a relatively moderate one for me. I enjoy may other activities and if it wasn't a skill I saw as good to keep proficient I would probably shoot very little. Pressing a button or pulling a trigger and making a hole in something is only so entertaining and can only be done in so many ways.
Ammo costs are also high when compared to many other recreational activities.
Part of what makes firearms engaging is the politics and laws surrounding even possession, transport, defense, and sporting use.
With groups of people constantly trying to change all of them for the worse.
I would rather it be a smaller concern, a simple freedom that one would rely on always possessing without devoting any time, and without worrying about breaking hundreds of laws by moving it wrong, crossing the wrong line with it...and on and on.
There is many activities I find even more engaging than actual shooting.
I can burn up enough ammo in a couple hours at the range ( I like rapid firing unless at longer ranges) even reloading to pay for a full day or even several days of enjoyment in other activities.
In fact plinking random targets (I pick up and dispose of my trash) is all that even keeps that fun, I can't stand paper targets, such a bore.
Moving exercises and drills can be entertaining, but I don't like being around other people who are doing such exercises on a regular basis shooting in multiple directions on the move. I can control my own safety, but the more people you put around you shooting in multiple directions...
I can't say I can understand ever getting rid of everything though, as even if I had no joy in shooting I would still see a gun as a practical defensive tool.
I don't get bored with the fire extinguisher and sell it, but it sure doesn't excite me.