Convenient theory. Far too simple.
A person may spend the entire day making dozens of decisions, being responsible for other people, and deeply enjoy a space where, for a while, they do not have to decide anything at all.
Another person may be gentle and accommodating in ordinary life yet enjoy control and initiative within a sexual context.
Sexual roles may reflect aspects of personality, contrast with them, change depending on the partner, or have no simple relationship at all with how a person behaves at work, with family or among friends.