If all ownership of handguns is based around the cheapest ammo, then there's no reason any revolver caliber over .357 to exist, no reason for .25 and .32 ACP to exist, no reason for .357 Sig or 10mm to exist. The reason they do is because they do things the .22's, 9mm's, .357 Mags, and .45 ACP can't do well.
Great observation, TruthTellers.