Clint Smith’s video defends the use of old long guns for self-defense, in his own special way. The Thunder Ranch guy uses several compelling examples to introduce the old saw “beware of the man with one gun.” Point taken. It’s better to be highly proficient with one firearm than to be somewhat familiar with a range of guns. That said . . .
One of my first gun gurus told me “you should be able to pick up any gun and shoot it well.” Assuming, of course, you know how to run the gun. Which you should know how to do. Which you can learn how to do by firing as many different types of guns as possible.
I have no doubt that you, gentle reader, have a number of firearms. Is there ONE that a bad guy should be afraid of more than the others?