The people you hire aren't you. That's why you're the one doing the hiring, and they're the ones being hired. That is to say, business owner's shouldn't expect their employees to think like them, and show the sort of initiative required to be, well, an owner. If they did, they'd be an owner. But the person you're hiring is not an owner. It's unfair to them, and unrealistic for you, to have that sort of expectation of them. All it does is breeds frustration for everybody involved.

Your onboarding strategy needs to be more than, "Shadow me for a day, and good luck." And then get exasperated with them 3 months in for still not performing up to your expectations. If you don't show them how to win, don't be surprised when they lose.