c@s:

Another thing leadership requires is sacrifices. It's not true to say that men in leadership positions have nothing to worry about except themselves, you will find that most of them don't spend enough time worrying about themselves because they are too focussed on what they are doing, same for women in top positions.

If time spent on childcare is the reason that women can't be in leadership positions, then the only way for women to be in leadership positions would be for them to spend less time on childcare. This is a sacrifice that must be made in order to be the best - if you don't make it, you won't be the best.