I would proffer a citizen's patrol would be impactful regardless. If they made good connections with the local police they could do a lot of good, without being 'vigilantes.'
I am tempted to say you might be right... In my (very small circle) we all turn our own wrenches and hammer our own nails. But I suspect in the U.S. population at large, this specialization/farming out of things is real.
My grandfather built his own house. I don't mean he subbed everything out, I mean he and my uncle cut wood and pounded nails till there was a house. Legend has it that he did everything but install the windows. He did all this after his day job at the shipyard. Hella smart guy. And for fun, he restored and sold VW Beetles (in the early 70's). Granted he was the exception even back in the early 60's when he built the house. By contrast, I had a 30-something guy tell me one time that he could not install his own dishwasher cause, you know, that involved electric and plumbing and he did not want to mix the two... (why don't we have a facepalm emoji?!?). In the age of the internet and YouTube, there is no good excuse for a fellow not to handle at least some of the household tasks - and I know some do. But there are a lot of folks going in the other direction. I think this is one reason why gun control is a thing. I mean, if you are afraid to try installing a dishwasher, you probably aren't going to be squaring off with thugs...
All that is necessary for evil to triumph is for good men to do nothing.
No one is coming. It is up to us.
I've built several large structures - two story garage behind our house and several other stand alone buildings. I didn't know shit about building, bought engineered plans for the garage on-line, read a book on framing, when it came time to wire it I read a readers digest book and had a good old time.
Why was I not scared to do this? Because as a kid I had made crude 2x4 go karts, skateboards using old skates, and learned to fix my own bike because it was going to be fixed the next weekend if I waited for dad to do it.
My parents had a slightly higher tolerance for 'hope he doesn't kill himself' than I had when I was raising my own boys because I kept a tighter reign on them.
Kids don't grow up that way anymore.
Adding nothing to the conversation since 2015....
I think it's more to do with products these days than kids these days.
When I was in college, I replaced the clutch on my Sentra in the street in front of Mom's house. Why? because the alternative was walking. That said, I've owned Nissans ever since, and the last thing I can remember needing, other than tires, brakes, and routine maintenance was the AC going out on my 88 Pathfinder, and I replaced it at ~160k because I couldn't see putting about $500, in early 00s money, into the thing. vehicles, for the most part ( Having read someone's Duramax experiences on here recently) are just way more reliable. They aren't growing up wrenching on their beaters because they don't have to.
And then you get into the things that you just can't repair, or it doesn't make financial sense to repair. Nobody is growing up 'wrenching' on their phone or Ipad. Software hacking, sure, but not hardware. I used to build and upgrade my own computers, but for what I do now I'm using a chromebook for most of it.
I could go on about people who seem incapable of fixing even the simplest things, but that's too long for a thread drift.
'Nobody ever called the fire department because they did something intelligent'
I think that was at least the speculation:
I think two things are contributors: a high divorce rate resulting in many absentee fathers, and an overemphasis on excelling in amateur sports.
In my case I sucked at the sports, and my parents didn't want me to have a minibike. They stopped short of forbidding it, but I had to learn to make things run myself, and much of that corelates to other things, like dishwashers.
Notice to thugs: We just bought all new appliances, and the dishwasher was the easy part. But I had to revise the plumbing for the fridge, move the cabinet and outlet for the microwave/convection/air-fryer, and alter the counter from a drop-in range to slide-in and rewire to share the circuit with the welder.
A peaceful man is capable of great violence, but he keeps it under control. If a man is not capable of violence, he is not peaceful. He is just harmless. (Jordan Peterson)