I’m going to say because it’s short, stupid catchy. Sometimes your brain goes to random places and then logic sets in. Ignoring typical reason is what makes absurdist comedy work. We obviously have a character playing it straight trying to figure it out getting more and more upset by the illogical which makes the bit work. The music is silly and not eerie at all and then getting scared freeze frame when they continue to point out the character is not scary is the kicker and sort of makes it worth it. This was probably just a random skit they threw in last minute and thought, just have fun. A lot of hit songs are simple, obvious, stupid and catchy. Rick James thought Superfreak was a throw away song too dumb to be on the album and it’s his most recognized song.