The other argument about teaching "advanced math" is the same as why Cristiano Ronaldo spends a significant part of his training in the gym lifting weights? Ever seen Ronaldo take out a barbell and start doing squats during a game? One should reflect on this.
In short, math is a powerhouse tool for carrying society forward.
Art, while cool to look at and experience, has a pretty low efficacy in terms of "motivating people to do work, or removing obstacles, to carry society forward"
In short, starving artists.
There is also the whole thing where art is an abstract concept with a subjective definition, and a solar cell sporting new tech with 33% efficiency objectively being better than one with 24% efficiency.
There were humans for tens of thousands of years before there was high technology. But there were hardly any humans around before there was art.
Idk, the soviets didn't invest in socialist realism propaganda for nothing.
Less sarcastically, art has had an outsized influence on society and culture. Take any social movement you want, and there was probably some novel or work of art that galvanized it.
10,000 artists in, one $20k work of art out.
Whereas something like the engineer is closer to
5 engineers in, $500k of work out (and even that is pretty conservative)
As a first order approximation the "price" of art (as distinct from its value) is a function of branding not asthetics.
Secondly most artists get paid, not from doing fine art, but from adjacent careers that require good color, balance, composition, and so on. Industrial designers (think Jonny Ive), interior design, food presentation, magazine layout, web design, architecture and so on. Art skills are all around us. In the same way engineering is around us.
Put another way, engineers build ugly (think beige PC boxes). It took an artist to give us the iMac. And it was a marketing genius (yet another important skillset) to bring the artist and engineer together.
Teaching math goes far beyond creating mathematicians. Teaching art goes far beyond teaching artists. Societies that drop art because it is unproductive get ugliness permeating everywhere.
Applies to art, fashion, media.
Most practical (including engineering) successes are much less externally attractive but do make decent money for everybody involved.
Further, judging the value of art to society by how much it costs is ridiculous and an asinine comparison.
It grew out of a time where basic artistic skills were expensive to learn, and could be a real class differentiator (and had some employment benefits).
That's now a fair bit less true; but still continues to prevent these things becoming the sole domain of private schools.
Did do writing although a lot was extracurricular.