I'd guess a lot of kids would see their parents, particularly their father, in a constant state of stress and hard physical labor as being a turn-off to any career, not just farming.
Talking to my wife's friend's husband (the one with the 10,000 acres and 8000 hogs and fireman for 30 years) many times over the past few years, he often laments not spending more time with his wife and children and wonders if it was worth it. Not one of his children have anything to do with farming. They all have successful careers in other industries, and I'd hardly call them lazy.