Theoretically, all people are capable of being president, but I ky very few get there, irrespective of ability.

You're right about their attributes being a guide. I reckon it's down to the confidence, more than anything. Bullys are typically seen as acting out due to their own insecurity. However, the skills learned in putting themselves above others likely helps to achieve personal goals. It's likely similar for attractive people and confidence. Confidence is a drug that affects other people.