The entire show is infused with camp, and Jotaro’s stoic nature is played for laughs fairly often. Also I am very amused by the idea that Araki doesn’t seem to understand the concept of a uniform, given that’s what both Jotaro and Kakyoin are supposed to be wearing. It’s worth noting they go to the same school.
Hey, Jotaro’s uniform is personally modified as part of his delinquent persona (many of the cast of Diamond is Unbreakable similarly have customized uniforms). And it’s very possible Kakyoin doesn’t go to Jotaro’s school, he claimed to be a transfer student but it may have just been part of the literal brainwormed ploy to try and kill him.
He gets it replaced on short notice in Egypt, as an exact copy of the one destroyed in the prior episode, and that’s even funnier
Also when you get to Stone Ocean and literally none of the prisoners have clothing that resemble any other prisoners it’s clear that Araki is either having a laugh or genuinely does not understand what a uniform is
