This is where an otherwise cogent argument goes awry. (By the way, this argument was used to deny women a college education in the early days). A good liberal arts college education has never been about job training. The decent living and better income for the college-educated is simply a happy by-product of its real purpose.

The real purpose, designed by the early Greeks back in the day, was to produce citizens who could function well in a one-person, one-vote democracy. By taking a variety of courses, people could learn to reason well based on facts (math/science), explain their reasoning in a lucid persuasive manner (writing, speech), used adequate context (history, social sciences), and access the humanity that make the reasoning meaningful (the arts).

This means that any degree should produce the same basic results. This intellectual flexibility is why the college-educated can succeed in jobs that differ from their majors or change jobs mid-life.

The skills to deal with logistics, to make reasoned decisions, and to show children we care for them are worthwhile skills for all parents, whether they work outside the home or are full-time stay-at-homers. Just my two cents after decades of teaching college students who went in a variety of directions after earning their degrees.