First of all, I think you choice of words leaves something to be desired. Your wording borders on being offensive.
But a .22 a waste of money? Not likely. I've got two single actions and an autoloader in that caliber. Great for practice, especially if you don't reload your own ammunition. And for casual plinking the .22 doesn't generate so much noise as to get complaints from local residents. And for small edible game, its second to none.