Imagination has brought mankind through the dark ages to its present state of civilization. Imagination led Columbus to discover America. Imagination led Franklin to discover electricity.
Should we have background checks, waiting periods? To drive a car you have to pass a test that shows you know how to drive your car safely, you should have to do the same thing with guns.
I found collaborating with congenial doctors about problems that physicists could help solve was very satisfying. I also like educating anybody who would listen!