And it's not just that it would cost a lot, it's that it would cost a lot and a motivated person can already do a 90% job of it for free on their own.
That's the thing, like, there's not a whole hell of a lot I learned in Phil 201 that is directly applicable to my job, but, you know the class is valuable. I took art history in college. Turned into being one of the most important classes I ever took and I'm one of those stem major types.
Productivity shouldn't be the point of education - you get productivity indirectly out of the education and search for knowledge, but if we want more data plumbers (which is largely what most of the programming I do for money on a regular basis is), I don't think we necessarily need to make certain that college is paying for them.
I mean, think bigger - this new technology is going to be utterly transformative to our society and economic system. If we could actually approach some sort of reasonable post-scarcity world, what would we want it to be like? So, maybe there's grades, but it's "pass/fail" or something, but all of these metrics that we use to evaluate have become targets.
I'd say, "why shouldn't so-called unproductive stuff get funded?"
A bit like public healthcare - everyone pays for it so that everyone can use it.