I'm not holding a gun to my lawn guy's head to coerce him in any way. This is what he chose to do to make money, in the face of all other money making opportunities.

If he took another job or income source tomorrow, and simply didn't show up again and didn't let me know, I have no power or authority to get him back behind a mower.

If he's doing it out of fear, it's not fear I'm placing into him. He has plenty of other ways to make money, so if fear of doing those jobs is what's driving him into the lawn care business, then nobody but him is responsible for cultivating that fear.

There's nothing wrong with mowing somebody's lawn, he beautifies my property, saves me from working in the heat, and in exchange I pay him slightly more than what he asked.

There's innumerable other things he could be doing for money, but he chose this one. Since he's good at his job, reliable and reasonably priced, I and my neighbors benefit from his choice and he benefits from having blocks of contiguous neighbors all hiring him.

Bonus, he even has two employees who he keeps in the labor market.