Cavemonster did not say that some art must have government support; he only demonstrated that JonathanQuick's protests carried no weight.The fact that governments and Kings have supported art throughout history is hardly a justification for continuing the practice.
Most of us don't support the principle implied in the “Divine Right of Kings”, why should we support the implied principle that some art must have government support?
I also question your linkage of the non-support for the divine right of kings and non-support for government-funded art.
Personally, I support government-funded art, though I admit I am not informed enough to discuss amounts or the decision process on which art is supported. What I can discuss is the fact that I am willing to accept an imperfect model that results in a lot of government-funded crap in exchange for getting the occasional non-crap. Of course, that stance is identical to my stance on nearly every government program because every government program has waste, efficiency, fraud, and elements I don't like.
The cost of living in an imperfect world.
That said, I find nothing distasteful in the stance of those who think no government funds should go to the arts; it's a reasonable stance, too.