Under the definition given, I think, art encompasses Art. It's the broader term. I don't even think everyone values Art as an ideal or strives to reach it. In that sense--that of the artistic ideal--it's totally relative. A lot of people never thought art ought to serve those ends. If you actually think Art is striving or should strive at Truth, I suppose Art would be subjective, but Truth would be objective and universal.

Yeah, politics totally ruined Chomsky and Lakoff, haha. Not that intellectuals should never get involved with politics, but if you, you know, care about what's actually true, you can't pursue that and simultaneously pursue what would be most convenient for a political goal.