That is true.I think 38spec. or 9mm rounds are both excellent self defense calibers.
The reason I chose 45ACP is because of the stopping power. Plain and simple. "THE ONE HITTER QUITTER".Most Americans are into the "bigger is better" line of thinking, and that's certainly their right, but I think for the great majority of American firearm owners a larger round is simply unnecessary.
I will agree that if you have a population of "drug-crazed Moro Native's" lurking in your neighborhood having a 1911 Colt 45 would be a plus...
The reason I didn't choose 9mm is because of the issue of penetration through the target and worrying about where that bullet goes after. You might aim at one target and hit others due to the high velocity round. Plus how many times you read of people being struck multiple times and still moving.For the rest of the bad guys or threat situations if you will select a good defense round the 38 spec. or 9mm should be more than adequate.
I think it's more about your ability to put your rounds where you want them than the necessity of having a larger projectile coming out of the barrel.
Another issue I have is with friends quoting all these specs about how fast certain bullet travel, 1900ft/s etc. Unless you are aiming at China, it doesn't matter to me. But anyone in my 25 yd radius, the difference in a 9mm and 45ACP hitting them is 0.00000123456 seconds. WHooa, big difference.
Anyway, to each his own.