It's like planning on the NBA or acting as a career: a high-risk proposition that requires total dedication in exchange for an uncertain chance of success. There are some people who are OK with that.
I think the conclusion is that only very dedicated students should go into these fields, which would simultaneously reduce the supply of people trying to go into them, and reduce the number of unemployed people with these degrees. I have little sympathy for someone who chose a high-risk degree like biology and then complains it didn't work out (at least the author of the article didn't make THAT mistake). People who think they are guaranteed a job in any given field simply because they have a degree, or that all careers have equal odds of finding steady employment, are completely out of touch with reality.
I was mostly talking for people my age (20s) that went to school for bullshit degrees only to come out 80k in debt and have no hopes of finding a job because they didn't do research into the market before they went to school.