Really all I'm talking about is not defunding/sidelining Arts etc "because it's not financially viable".
The idea is really to provide a well rounded education, (giving students a broader perspective on the world, a stronger vocabulary for expressing ideas, etc), as opposed to a purely career focused one. I think it would be detrimental to culture and society in general if everyone was groomed from high-school to only ever consider the safe, paved, career footpath.
This may take the form of allowing for more electives in vocational courses, encouragement to take double degrees, or eliminating barriers for later study (letting people change their minds, or even just reskilling when the robots take over).
What I was meant by "subsidisation" is just the "somewhat" free education that exists in some places today, but has been more prevalent/widespread in the past. And while prioritising vocational degrees is fine to some extent, crippling participation in the Arts by making those qualifications prohibitively expensive (by not providing loans) is a bad idea imo.