Complaint Regarding Feelin 70s

To preface, I was given permission by the Discord Twitter account to make this post. I have an issue with the new “Feelin' Retro” collection on the Nitro store, specifically with the profile effect “Feelin' 70s”. I understand that the collection is supposed to be reminiscent of the 1990s, so it confuses me as to why that effect is labeled as being of the 1970s. At the very least, it could be 80s inspired, but it's certainly not from the 70s. I have faith it's a typo, but if it's not I would love to hear an explanation as to why it's 70s inspired. Thank you for you time.