Alimony is temporary and fixed, whereas careers are not only life-long, but have compounding growth.
There is a significant financial gap between a divorced woman in her 50s with only five years of alimony remaining and a career woman in her 50s with a $400,000 401(k) balance.
You forgot to mention child support which is for up to 18 years. Also, nothing stops the woman from having a career, especially if she cooperatively shares 50/50 custody, but often they prefer aiming for nearly 100% custody because it increases their child support payments, and then still have the option to cry victim that they’re a single mother despite getting thousands of dollars a month and they’re actively preventing the father from being involved with the kids. Happens a lot.
As for a stay at home mom who doesn’t get divorced, she doesn’t need to be entirely stay at home for all 18 years.. kids go to school at 5 and can go to after school programs if necessary while she works. A couple years before that if the kids are in pre school she could get a degree or masters degree or work part time. So the career gap could be minimized.
Probably depends on the state, but last time I checked it was until 18 or high school graduation, but not later than 19, in the state I’m familiar with.
Western Marriage is a contract where one party is rewarded for breaking the terms. The low marriage rates of Millennials / Elder Z [1] are indicative of this new world order. It isn't just "because men!!".
There is a significant financial gap between a divorced woman in her 50s with only five years of alimony remaining and a career woman in her 50s with a $400,000 401(k) balance.