I think the numbers above actually make sense if you look at the pressures that influence decisions on what to study and whether to get a PhD for national vs international students.
If you're international getting a bachelors you need to find a company willing to sponsor when you graduate so it makes a lot more sense to pursue a STEM degree that is in high demand to employers.
For graduate students their is compounding pressure because getting a PhD allows the student to stay in the USA while they obtain the degree and STEM degrees qualify for the STEM OPT extension so instead of only having 1 year of work authorization post graduation you have 3 years. If the goal is to stay in the USA permanently it really doesn't make any sense to pursue a non STEM grad degree.
I don't have any commentary on whether the way the system is set up makes sense but I don't think it's just a case of American kids don't want to study these subjects rather theirs intense immigration pressure on international students to funnel them into STEM subjects.
If you're international getting a bachelors you need to find a company willing to sponsor when you graduate so it makes a lot more sense to pursue a STEM degree that is in high demand to employers.
For graduate students their is compounding pressure because getting a PhD allows the student to stay in the USA while they obtain the degree and STEM degrees qualify for the STEM OPT extension so instead of only having 1 year of work authorization post graduation you have 3 years. If the goal is to stay in the USA permanently it really doesn't make any sense to pursue a non STEM grad degree.
I don't have any commentary on whether the way the system is set up makes sense but I don't think it's just a case of American kids don't want to study these subjects rather theirs intense immigration pressure on international students to funnel them into STEM subjects.