I too had to lookup ELI5 and am at a complete loss regarding any implications, meta or otherwise.
The implication is that HNers are more interested in Q&A sessions over what amounts to a lecture. You could frame that as positively or negatively as you like: a fixation on fame and fortune over substance; a disinterest in having someone else explain what you could learn on your own; a preference for an interactive setting rather than a receptive one; etc.