I don't go around killing people every day, myself. But, a .22 rifle is a dangerous thing to be on the muzzle end of. I don't know of a man that could take the firepower a 10/22 offers and survive center mass hits. No, I don't keep one loaded for that. I hunt small game with .22s and enjoy them at the range and out at my place just plinking. I consider the .22 rifle one of the most useful of weapons for fun in the field. I grew up with 'em as I lived in a creek bottom full of squirrel.
OTOH, I don't get all worked up over someone suggesting that the .22 might be a formidable weapon for home defense. I know I could use it. I know my skills with the weapon, honed over 50 years, and I know how to shoot one rapidly and accurately. i think i'd actually PREFER a .22 rifle to a Ruger LCP, much more accurate, easier hits, faster follow ups, you can practically write your name on the guy's chest with it at machine gun firing rates at short range.
So, it's not a subject to be name calling over IMHO. Your opinion of the .22 may differ. If you hate 'em so much, just don't ever buy one. You won't know what you're missing. Of course, I grew up with a .22 in my hand so I'm a little biased, I guess. I have far more fun with one than any center fire when I'm in the field. And, east Texas squirrel season is next month. I'm kinda thinkin' about getting back to my roots.
Anyway, back to the shotguns or carbines thing, I do prefer the shotgun with 3 buck for MY needs. I also grew up with a shotgun as I love waterfowl hunting and have since the age of 14. I'm as familiar with my shotguns as my .22s, and you can mess up a guy's chest with it with just one pull of the trigger.