Why should tens of thousands of people die every year for the sake of a hobby? Imagine if every year 30,000 D&D players stabbed themselves or someone else to death with a Longsword.
All of those activities have to justify themselves on the basis of the social and economic benefits they provide, and the associated risks. They are also very highly and well regulated activities. Drivers, pilots and sailors all must have licenses and operate within strict limits. If your point is that firearm ownership is of a similar kind and, if allowed at all, should also be subject to similar strict controls and proficiency checks, then I completely agree.
We all do something dangerous and fairly antisocial. But only one of those things tends to be demonized.