It's not merely that conservatives are better at selling their product, or that they happen to have an easier-and undoubtedly simpler-ideological product to sell. It's that they know what they are selling. Liberals in general and Obama in particular cannot say the same.
But it's much more exciting to make Die Hard. One of the reasons that I think that movie is so successful is it deals with those very important blue-collar relationship themes. But it's more visually beautiful to show things blowing up. It just gives you more on the screen.