Why do girls usually have more stylized, often "better" handwriting?

ELI5
There are a few possible reasons for why this is the case [1, 2, 3]. First, cultural stereotypes may play a role [1]. An experiment asked boys and girls to imitate the other gender's handwriting, and their imitations followed stereotypes [1]. Second, the different levels of hormones in boys and girls may make them better equipped to deal with handwriting [2, 3]. During prenatal development, girls have a longer index finger than a ring finger, and boys have the opposite, which may indicate more prenatal estrogen and less prenatal testosterone [3]. Third, the nerve fibers in boys haven't developed as much as in girls when learning handwriting, meaning that girls may be better equipped to deal with writing [2].
On average the males in the study had bigger hands than the females, and their second finger tends to be relatively shorter than their fourth finger possibly resulting in a different writing style. [1] Women have prenatal hormones that cause for more "feminine" handwriting, which on average contained more curved and bowed-out letters rather than straight. [2] As a whole, society places a large emphasis on females and the importance of them being beautiful in everything they do. This may cause women to feel the need to write a certain way. [3] In contrast, males place significantly less emphasis on looks, and they obtain the notion that work is to be done swiftly and efficiently without concern for how good it looks. [4, 5]