That makes sense if male is default gender with no meaning. And that’s not true. You are confusing gender and sexuality. And I would agree, until Tennant, the Doctor wasn’t presented as a sexual character. A man, yes, and with some flirting with Jo aside, for the most part not a sexual character. I think they returned to that with Capaldi and Whitaker. Personally, I feel it’s there. She was strong, the stories could’ve been stronger.