This flexibility and cost you are talking about is borne entirely by them as they rearrange their lives and attempt to make things work while men continue with barely any disruption.
I'm my opinion this is deep, unintentional, structural sexism. It is the biggest issue I have with articles like this.
Stamping out overt workplace harassment and sexism is barely the beginning. There are deep structures in place that have benefited men like me for millennia.
These need to be considered not as complicated side issues but as the core barrier to achieving equity (as opposed to equality) in these fields.