The problem with YouTube, and Substack, and, really, any social media is the problem with vetting.
I get it, your channel may be perfectly cromulent, but you know as well as I do that the well of crazy on YouTube goes pretty deep and literally anyone can start a YouTube channel.
Rather than vetting each individal channel, and then getting into arguments of “Buh, buh, you approved THAT ONE, why not MIIIIIIINNNE!” it’s just easier from a mod perspective to go “Yeah, no.”
If I were to guess… it’s probably because the chemical makeup of energy drinks would damage the machine? Maybe it’s more acidic or something?
TBH I am 100% guessing here, talking out my ass, having done ZERO research on the topic.