The original poster - to paraphrase - said "I want to practice shooting with one hand with 50 rounds per year because it is easier to learn to shoot with one hand."
Bottom line, if anything someone can learn to shoot easier with two hands.
That is a really, really poor paraphrasing.
Though it was never stated explicitly, the intent at least was "if I were making an attempt to teach someone to shoot a handgun defensively, who cannot afford classes, travel, nor more than 50 practice rounds per year, what technique should I teach them?" Bonus points if it takes less than 2 hours to teach, as a lot of people just do not] have the attention span to make it through 8 hours of instruction without Ritalin.
-----
Being able to shoot, and hit, with one hand is an important skill. I don't think anyone is agruing that.
The OP originally stated that one hand is better than two hands:
If you'll read my later posts, I clarified my position, mainly by repeating things which everyone glossed over in the first page. One handed shooting is not "better" all around. However, it may be "better" in certain ways so that, if someone were trying to learn defensive handgunning, with zero emphasis on "target" marksmanship, no priorities except getting fast center mass hits at ranges well inside 10 yards, one handed may be the best first technique to learn. Gunfighting does not have to be this mysterious martial art type thing where you have to hit the dojo twice a week for a decade to get a black belt. Fairbairn got a lot of men combat ready in a few short hours.