If you are going by that definition of "wouldn't matter" then it probably holds for all movies. And lots of other enjoyable stuff. Not a very useful definition.
I'm not saying entertainment is meaningless, I'm merely objecting to the claim that "it has to get done." No, it doesn't. It's not mandatory, it's a luxury.
Getting paid to satisfy others' frivolous pursuits is the future of work. With more real-world work being automated away, we'd better hope there are jobs like "World of Warcraft Concierge" and "Sim City Colorist." All the "honest day's labor" jobs are evaporating.