Except for those who got their PhDs in Data Science or Computer Science, everyone else with a PhD (that I know) seems to be struggling financially. Recently, I heard that it's common for folks in biology to do a postdoc for more than 5 years (40k$ yearly salary, no benefits). They also seem to be all stuck in a cycle of poverty and being too specialized. Increasingly, PhD students are foreigners as Americans dont want to waste away their lives. So, is it a waste of time to do a PhD in a non-CS field?
A friend of mine has a PhD in math. She is one of the smartest people I know (in her field). She can barely afford food.