The board has the perspective of _ownership_. The employee has the perspective of _being commanded_.

Imagine something nice that you own- like your car. Do you feel compelled to understand your car? Must you be an excellent driver to own that car, if you can afford it?

No. And while it's not exactly the same, the people generally look at the company as a machine that makes them money. They don't have to be good at anything to own that machine, and if they want, they can even share it with their drug addict fail-child.