Because laser blasters and nuclear weapons cannot be attained legally or illegally. Even if they could be the price would stop 99.9% of people from attaining them. Similar to why there are no poor people at the nice gyms and country clubs we enjoy. Small arms can be bought illegally at any time. Thus leaving the law abiding citizen who isn't allowed these weapons helpless to do anything.

What would you do if you were denied access to firearms and then were victim of a home invasion leaving you traumatized at best or dead? Is the likeliness of that happening just so low that it is acceptable for you? Just curious...