It is a simple fact that women prioritize a man's earnings capabilities when it comes to dating and marriage.
Several academic studies have demonstrated this.
Ludwig, V., & Brüderl, J. (2018). Is there a male marital wage premium? New evidence from the United States. American Sociological Review, 83(4), 744-770.
Durante, K. M., Griskevicius, V., Simpson, J. A., Cantú, S. M., & Tybur, J. M. (2012). Sex ratio and women's career choice: Does a scarcity of men lead women to choose briefcase over baby?. Journal of personality and social psychology, 103(1), 121.
Wang, G., Cao, M., Sauciuvenaite, J., Bissland, R., Hacker, M., Hambly, C., ... & Speakman, J. R. (2018). Different impacts of resources on opposite sex ratings of physical attractiveness by males and females. Evolution and Human Behavior, 39(2), 220-225.
US marriage rates may be dipping because of a shortage of financially stable men, study suggests
Men are encouraged to work longer hours at harder jobs because they know it's necessary if they want a girlfriend or a wife. This results in worse health outcomes, a shorter life expectancy, higher stress levels, and an overall worse quality of life.
But this isn't just an issue that negatively effects men. Two of the biggest effects of hypergamy should be pretty obvious: the wage gap, and the child care gap.
Besides just effecting the choices that women make in their careers (by prioritizing a high earning husband over a high earning job), it also effects tangential issues like women not being taken as seriously in the workplace.
Because men work longer hours and at harder jobs, they earn more money than women. But they also have less time and energy at home to take care of their children and do the cooking and cleaning.
Addressing hypergamy would therefore not just help men but also women.