I think you misunderstand the point of these performances. When I was a liberal the appeal of these performances was that it gave me the reassurance that the republicans' attacks about the dems being unpatriotic were false. Well, not exactly a reassurance, because I'd always known that, but more so a reminder. It's propaganda for energising the liberal base. And it serves to tell the donor class that the Democrats are firmly committed to the bourgeois vision.