Thanks for the shout-out, but I don't agree with your assessment of an average person or the Rihanna non-sequitur.
The problem is not Rihanna or liberal arts degrees. The problem is (1) college costs too much, but even if the cost was somehow brought down, (2) we don't have enough capacity in the colleges, but even if the cost was reasonable and we had the capacity, (3) our public education system is failing to set students up for success in college. All of these issues, at the end of the day, come down to funding and priorities.
As to 1 - US in-state tuition is about 2x the average public college tuition in Canada and Europe, and 4x the average public college tuition in China.
As to 2 - The US has about 15m public college undergrad seats total, which is enough to serve 4.5% of the population. I think we need to increase this to keep up with China.
As to 3 - I don't have hard and fast data for this, but it's concerning that engineering is one of the less popular majors.
https://nces.ed.gov/fastfacts/display.asp?id=37 Anecdotally, I think the issue is we make it out to be this intimidating thing where only super nerds that got straight As in AP-level math and science can succeed. But that shouldn't be true.
You don't need to know how a pencil is made to be smart. Being a Rihanna fan and being a smart manufacturing engineer are not mutually exclusive.