millenial here. I know everyone here is millenial too, larping as gen z but whatever.
it was funny not mainly because of its content. but the context. like a private joke between you and a friend in class or church - where you're not supposed to laugh. it makes it funnier.
WoW and online gaming in general at the time was not a public thing. It was an intense private secret. an escape from public life (which was miles better than it is now) - but a social escape / taboo that no one should find out about. makes it funnier. just like PurePwnage.
you had to be there, basically