Part of her thesis is that weaving and textiles have been stereotypical occupations for the distaff gender because they can be done in a single location and are interruptible, making them very suitable for child-rearing.
“Professor emerita of archaeology and linguistics at Occidental College”
Women have always run the household and as GP mentioned these activities can be picked up and put down as time allows. With very small children especially, this time is often vary rare to find..!
The fine motor skills in boys develop few months later on average, but they grow up skilled just fine.