system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it that when a couple gets divorced the guy is usualy the one who gets screwed over the most?
gpt
Households that had a traditional gender role split then have a traditional gender role split in divorce.

If a married couple choose to have children, and decide to divide the labour of raising the family such that one person sacrifices a career, while the other maintains their's with minimal interruption to provide the financial needs of the household, it makes sense that, were the household to split, the one who had historically been the caregiver would continue to be the caregiver, and the one who had been the financial giver would continue to be the financial giver.

This heads off problems where the one who gave up career nurturing would not be up shits creek because they had no resume to show for the time that they committed to the nurturing of the children in the household. It also heads off the (less complained about) problem wherein the one who had traditionally been available and dependable in their career, suddenly might have to take off way more time, and become way less dependable, in service of nurturing and raising children.

Finally, its head off the consequent, were the two less-desirable outcomes to happen (wherein the one who sacrificed resume-building must find a shit job, and the one who has a job requires more time off) in which the first cannot actually find a job (and can therefore no longer provide well enough for the children) and the second DOESN'T sacrifice time from their job, therefore not providing well enough for the children.