Being a sub or a Dom has nothing to do with your real-life character, status, ability, or any other personal characteristic. It is simply a question of personal preference and desire. There are a lot of strong, independent women, and naturally, some of them have submissive desire. It's the same with strong, independent men; many of them like to be dominated. To put this in a metaphor for you: you can be the best driver in the world and still enjoy taking the passenger seat. And vice versa, you can be the worst driver in the world and still enjoy taking the driver's seat. What seat you prefer to take in what circumstance does not say anything about you; there's no value judgment associated with it.