It’s like a tall girl. Guys usually want their wife to be shorter — or at least not taller — than them. (And the wife similarly usually wants a taller husband.) It is a natural instinct.
Same with knowledge. Guys naturally don’t want someone more knowledgeable. Usually that isn’t a problem finding.
RSRH –
That is indeed a major factor in the problem. With the girl being so busy in her academics, she has no time for real life — especially family.