This ratio gets worse because American students are disproportionately more likely to follow up their engineering undergrad with law or business school, so even if they may be engineers they’ll get into business and/or something like patent attorney going forward.
There's nothing wrong with being a librarian or getting an MA in Museum Studies, aside from the price of getting the degree and the low odds of getting a job without waiting for someone to die so another position opens up.
There's a reason you won't find a lot of foreign students pursuing them, though.