Wolf, I personally think that at the time Chazal said it, it was true. The general population was rather uneducated and illiterate, very few had decent educations. Women NEEDED to be with their children because there werent alternatives to nursing them. Women also married much younger and even during childhood had to work much harder. Sure, when a woman is only focused on birthing/raising/feeding her children with all the hardships that were around in those days, they didn’t have the time/energy/capacity to learn.
Nowadays, reality is different.