Your argument holds no water, and is much like the arguments of those opposed to people carrying a concealed pistol, or open carrying. Back when CPL was passed, everyone (anti's) were afraid that it would turn the state into the wild-wild-west with shoot-out's on every street corner over petty arguments.
Many, many years later we see this isn't an issue, and as a matter of fact there has only been a few incidents with CPL holders using their weapons in the "wrong manner".
I, a CPL holder, would much prefer to taser someone than shoot them in the "right" circumstance. If someone was violently attacking another person, with a gun or other very deadly object, I would draw my weapon and "stop the threat" even if it meant the attacker died in the process.
Now let's say I was a CPL holder standing in a party store, and a man who "claimed to have a gun" or was armed with a baseball bat came in to rob the place. I would now have the ability to make a choice. It allows me to drop this person and control a threat without killing them or causing any harm what-so-ever.
Now you're issue of "pulling my taser" and dropping my sister to the ground because we are arguing over who's kid threw sand at the other first, in the heat of an argument, is ridiculous. Honestly if I even touch the taser, accidentally even, during a heated argument that could be construed as an intent to use it. Not something I want to have the POPO visit me about.
The fact that a 21+ year old has not had a felony (or certain misdemeanor) convictions says that they must be doing something right. The fact that they will go through the cost and process of getting a CPL says that they probably have no intent to do anything wrong. Honestly if they wanted to do something wrong, they could just steal a taser and use it.
The issue of owning a taser legally by a CPL holder does present many, many more oppertunities for the use of "less than deadly force" to protect yourself or a third party from imminent danger, as the law allows. I think this is a GRAND idea.