It theory I agree, but not in general practicality. First, securing the family does really work if a large family. Second, calling the police every time there was a suspicious noise would quickly result in their stop coming since 99+% of the time it is nothing.
Today (actually now yesterday) a few of us went thru a few hundred rounds target shooting. The others brought paper targets while I brought soda cans. Almost immediately everyone found it's a lot more fun shooting cans. Cans usually move and jump when you hit it - so how many times can you hit the same can as it is knocked back and around? How many cans can you hit and how fast emptying your magazine?
Paper targets are more for sighting in a scope or other sights (adjustable iron sights, laser, red/green dot, holo sight etc) - but also for practicing very precise rifle shots for distance shooting. I prefer small, moving targets. If a person can knock around soda cans at 10 yards in relatively quick firing, the person is good enough for self defense. It's not that easy to do with a handgun.
I am not anti less-than-lethal. Firing tazers (though Phaffer is a better brand choice) and less than lethal shotgun shells (bag, rubber/plastic pellets) are also a possibility. We have both setups (Phaffers and less-than-lethal shotgun shells. I load my shotgun for home defense with a non-lethal shell on one side and a lethal shell on the other, with 5 shells on the stock to quickly reload and/or replace how the 12 gauge coach double barrel is loaded. For example, if checking noises outside, I will replace the less than lethal 12 gauge shell with a slug if placed correctly (the most lethal) because the concerning noise may be hogs or otherwise likely to be a "friendly" on a surprise.