No. I agree. But there are many many law enforcement (and -esque) groups that do have at least cursory gun handling standards and require time on the range.
Like the NYPD cops who were attempting to stop a bad guy in Times Square? They only shot nine or so innocent bystanders, despite approaching him from the rear. Like my local cops? Anytime they have to shoot at someone dangerous in a car, it looks like that car took a few dozen rounds of buckshot, 50-70 rounds on average.
I know cops, I know cop culture. The only ones who reliably shoot well are the ones who are themselves enthusiasts, and often train on their own dollar unless they're SWAT. They have better training budgets, obviously. Hell, I know a cop that did not know how to disassemble and clean her duty weapon, leaving it prone to malfunction from years of qualifying practice, and years of accumulated lint and dust. I know another cop that shot himself in the calf muscle while re-holstering, because he forgot to keep his finger out of the trigger guard. Enthusiasts who attain a license of their own volition or sense of duty to their families just don't seem to have these problems quite as often.
The best argument that I have for people arming themselves is this: another two cops I know left a dog-walker scarred and with nerve damage after they beat him up, because he told the driver of the car the cops had pulled over that he would be a witness in court that he stopped at the red light.
Another cop from the same department inexplicably helped the face of a young man become more intimate with the pavement for no discernible reason, as said teenager was on the phone with his father, who himself was a Sheriff's Deputy in a neighboring county. The young man was not acting threatening or aggressive, and the police would have covered it up, manufacturing a statement which could not be corroborated with the witnesses. Were there no video footage, or a witness on the other end of the phone, they would have got away with assault and battery, under the color of law.
Some cops might be good, maybe even the majority; but when something like this happens, even the good ones tend to toe the thin blue line, and give their own the benefit of the doubt over any reasonable quantity and quality of testimony. That PD had to pay out about 1.5 million in settlements for brutality last year, and I wonder how much more we did not know about, that just got shuffled under the rug. We should give these people a monopoly on the use of force? Now, to me, that's crazy.