Because Lorde is perfect, the hook is insane, the perfect riff on every travel trope, a perfect existential representation of your f*cked up life and a clear manifestation of all those deep-seated psychological issues that arise as summer grinds to a halt, because nothing is perfect and never will be AND NO ONE ESCAPES. Basically, completely perfect.
It’s a certain type of person who wants to visit the wettest place on earth. Maybe the Pacific Northwest was just a bit too arid for their liking. Or maybe a week-long trip to the Atacama left their skin drier than… well, the Atacama.