Higher education is strongly associated to lower fertility rates. Especially for women, but for men too. So no the argument doesn't ignore the existence of smart women. Smart women (and men) just far less likely to reproduce, statistically speaking.
If your answer to that problem is less women should attain higher education and take care of raising children instead, we just fundamentally disagree. Women have an equal right to education and working as men do.
The charts you refer to show an environment where the responsibility for care work is heavily skewed to the detriment of women. If men took up a bigger part of raising children, it would be easier for couples to do that. But the vast majority of men don't.