There's a big difference between driving a car around the farm at 20kmph to collect wood and flipping your dad's Volvo into a ditch. We were driving from a relatively young age, maybe 13 or 14, but only in a paddock and with some degree of adult supervision.
For children working in the mines the choice was not between working or chilling in the mall. It was work or imminent death from starvation. So, yes, it was a good idea to work. It still is in less prosperous parts of the world.