I'm not sure why you think a person's lack of honesty and integrity in their personal life is unrelated to how trustworthy they are in business.

If they are willing to betray their own spouse then they are absolutely capable of deceiving and betraying their employees and shareholders.

This separation you seem to see between business and personal life doesn't actually exist. That's an unrealistic fantasy.

We may conceal parts of ourselves at work for politics and professionalism but you are the same person inside of work and out.