It's less so than it used to be, but... I get what you mean. [ Not everyone is armed like they were back then, but the screening process was also a lot less rigorous. ]
I don't think we have the right to make those decisions on behalf of the entire population, but... I also don't know that there's a better way to do it. Juries are comprised of ordinary, average people too. I'm not saying it's a perfect system, but... what's the alternative?
That said... there's hardly enough of us left here to warrant official law enforcement.