I think what you're saying is that ambition is not rewarded in the dating/mating game, which is decidedly not the case (today or a long time ago). If you took birth control out of the equation, which men do you think would father the most babies today in the US, men with high ambition or men who chose a "safe career" and "stable income"?
Birth control changes everything. The number of children a man has is inversely (and counterintuitively) related to the number of sexual partners he's had.
Nowadays, many couples don't want any children and this trend will just increase over time.
As for long ago, it may be true that richer men had fathered more children. But you must also take into count the number of children fathered by the much larger number of men with average salaries.
