it could also be a function of the "bart effect"
For decades, little boys in media have been portrayed as basically retarded, troublesome brats that don't amount to much
Daughters on the other hand are portrayed as angels who are super smart and grow up successful just by default
Lisa vs bart simson is an example of this
This is somewhat also related to the "dumbass dad trope" in media. Where a guy marries a woman way out of his league that he doesn't deserve.