Little kids do little kid shit, and for that I don’t question this kid’s lack of motive for shaving his head at all. The only reason he needs is “I’m like, 6, so I’m going to do 6-year-old shit, The End.”
As for the lady filming him, what the hell? This kid’s too dumb to know any better, but the moment he whips out a razor you went running for a camera instead of taking it away from him and realizing “Hmm this will most likely end very, very poorly.” Haven’t you ever read that Calvin & Hobbes comic where Calvin shaves his head and has to color his head with yellow marker afterwards? Shit didn’t end well.