I am not equating abilities. I am saying that people who have intellectual capabilities should not use them just for non-Torah subjects, leading to undervaluing of Torah by them – and, if R Eliezer and you do not care about their own views – transmitting it to their sons.
Middos are transmittable, not just intellect, even strength – as R Yohanan sand to Resh Lakish.
As to tiflus, it seems to be something we can reasonably analyze: schools & seminaries that end up producing tiflus outlived their purpose (circling to the topic), the ones that do not – do not, and I would be presumptuous enough to think that Rambam will agree with the observations.
R Steinsaltz in his short book Essential Talmud (that, unfortunately, has almost as many references as Rambam’s Mishne Torah) brings several observations that girls were learned in families of Talmidei Chachamim, bringing examples, but also a notion that it is a good idea to marry a daughter of T’Ch because if something happens w/ the husband, she will be able to educate the children in Torah. Anyone knows what is his source?