People are people, regardless of occupation.
I have been in commercial aviation for about 40 years. I've worked with hundred of folks some with A&P's and many who didn't. Most licensed men/women we're usually smarter than non A&P's, BUT.........I have worked with some A&P's that couldn't tie their own shoes. Book smart doesn't mean you know what end of a hammer to hold, much less put it to work.
I have trained many ,mechanics, plumbers, electricians, and some folks that could barely install insulation blankets, but I tried hard to get folks up to speed. I have watched guys fug up thousands in parts. Sometimes I would walk away counting to 200 to keep my composure.
I also know some GREAT automotive mechanics that are very under paid for their skill level.
I also work with a handful of aircraft mechanics that are just plain BRILLIANT! Some of them seem to know EVERYTHING about our airplanes. We work the entire airplane up to delivery. As a Lead, I am the last stamp (for an hourly tech) before the A/P flies it's first flight, (and every flight after) and when I tell the customer that their $250+ million A/P is ready to start flying people/freight/fuel around the world at 38,000 feet. Ya, very stressful knowing somones kids are on my airplane. Most guys I work with consider the airplane we are finishing up, think it's "their" airplane. Personal pride.
I truly enjoy and take pride in every airplane I work on.
We do have to know a TON of specifications and how to fix/finish anything on the plane. Windows, interior, avionics, 5,000 psi hydraulics, 240v 3 phase, 28v DC, 115v 2 and three phase, fiber optics, landing gear, tires, brakes, flaps, spoilers, speed brakes, high pressure pneumatics, water systems, toilet systems, (and yes, I "get" to dump the shit tanks after test flights. I do it so the crew knows I ain't afraid of shit jobs) all flight deck switches, how to run all systems for testing/troubleshooting, paint touch up, how to clean anything and everything on/in the airplane, fueling systems, just pumping gas and thousands of other things. But my favorite duty is sitting in the pilots seat making airplane noises.😆
And. I have to build race cars when not working on airplanes. And fixing washing machines, lawn mowers, kids toys, interior trim, doors, exterior siding, decks and roofing, neighbors water heaters/furnaces so they don't get mad at me for firing up an engine at 1:00am😵
But, I cannot fix stupid people, Lord knows I try to almost every day, and be their "daddy" or therapist. Funny how you become a Lead/foreman, people think you are a doctor/therapist/financial advisor/religious counselor/etc.
Recently I had a gal (asian) who is a VERY hard worker, miss a day and when she came in the next day, she walked up to me and I asked if she was OK? She stood there with a completely blank stare and said "My husband dead!". Let me tell you, THAT was a first for me! My boss came in a few minutes later, and I told him, and he drove her home. Man! Showing up for work the day after your husband dies! I do work some very dedicated people, not all of them though, but that's for another day when I retire.