I’m in medicine, and one of the biggest issues I see in my field, as well as science in general, is a lack of ethics and cultural understanding. The humanities give context for scientific findings, and guide us in the research process. Without it, we wind up with the Tuskegee trials or Nazi medicine. The same sort of things can happen in tech (privacy, security, wellbeing) and engineering (safety, integrity).
Humanities aren’t a waste of money. They broaden your knowledge of our world and the people in it. Maybe you don’t have interest in art or history, but law, ethics (or other areas of philosophy), and sociology all can help a person be more well-rounded.