Let’s see if I can get through this without referencing Julia Cameron’s 1992 book The Artist’s Way . “Rock Music” presents a simple, compelling argument: Art is daily bread. Charli XCX has always used arch presentation and extreme sounds to conceal a fundamentally earnest, romantic point of view, and beneath “Rock Music”’s shroud of heavily processed guitars, she advocates for creativity as a form of essential lifeblood. She suggests it’s something that can be as spontaneous and lighthearted as taking pictures with your friends at Jean’s, and something you should put your body on the line for: “The nerve damage is real/But it’s the only way to feel,” she sings, referencing the physical trauma she’s suffered as a result of years of battering herself around onstage.…