But, when I was 10 they didn't have safety gear - or if they did it wasn't available where we lived.
I really think that is the real issue here. No safety gear, no seat belts, etc! Those were days that are so much different than today. Call it work ethic, call it stupidity but back in the '60s (or earlier)
I was taught by my "elders" to get stuff done and be safe doing it. I recall soaking my corks in used oil (hydraulic and/or motor) to waterproof them - went through a bunch of socks until the oil stopped leaching out. I would imagine doing something like that today would get you thrown into either the looney bin or jail. Yet, here I am today with both feet still attached - although I still, to this day have cravings for a shot or two of 3-in-1 oil

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I'm guessing it all comes down to perspective. Setting chokers at 10 and throwing bales during hay season were normal for almost everyone I knew back then. Never thought about it being child labor!
Fortunately, I'm still seeing this going on out here where I live now. Our neighbor is a good sized cow farmer, his grandsons & great grandsons are driving trucks, tractors, skidsteers, hauling trailers, etc - whatever it takes to get the job done. Trucks and other equipment may need blocks on the pedals and something to sit on so the youngins can see out the windshield, but that's just part of growing up.
Please don't get me wrong, I just can't imagine having a 10 year old driving a vehicle in the city - although I do hear instances of this on the news frequently, but that is a totally different thing!
I believe, from personal experience, that these young men & women that help their parents, etc on the farm learn to grow up quick and develop a great work ethic, but also become the envy of non farmer kids because of all the "Fun Stuff & Cool vehicles" they get to play with. Afterall, who needs a Tonka truck if you have the real thing!