It's not as if we are awesome at humanities education and we should sacrifice humanities education in favor of STEM education. We currently suck pretty hard at both. I don't think advocating for better stem education implies that it should be at the expense of humanities. In fact 2 of the letters in STEM (S and M) are actually humanities.
STEM skills are in high demand on the world market. If we successfully train lots of people with these skills, it means we are able to produce more things people actually want. This means better products and services for the world and more money for the people that made those products and services. As opposed to training lots of people with Asian American studies educations or European History educations, which may be very rewarding, but provide relatively little utility in large numbers.
The way I see it, the more we invest into STEM now, the more we can automate tedious tasks, the more wealth we can generate for less human effort, the more we can afford to spend our time learning about Asian American history without worrying about not having enough food to eat.