Why does Bob (and consoomers on discord) have to pretend to have been life long fans of Moon Knight? It's okay to have never heard of Moon Knight before.
They either have no "true" persona, or are deeply upset/ashamed with the one they know they have, so they build false personas around themselves, ones that are all-knowing and all-seeing and never wrong about some pet topic. In Current Year (tm) where independent thought is dangerous and problematic, those topics are very very limited, and boil down to just shallow consoomer pop culture and purity of political ideology.
Bob's false persona, the one he constructed to avoid having to dwell on the fact he's a fat, dumb, loser, is one who knows
more about any comic, film, video game or other IP-based entertainment monolith than you.
He has to, otherwise his internal intelligence check fails and the entire false world he lives in comes crumbling down, leaving behind nothing but the fat dumb loser in the mirror. (or beer bottle reflection, as it were)
So, he needlessly acts like the one bullshitter guy at work who always has to one-up you because to NOT do so is to have his self-identity slip through his fingers as the unstable pile of sand it is.
He can never be wrong
He can never be uninformed
He can never be just casual about ANYTHING
He's ALWAYS the EXPERT (tm)
Even when he's clearly NOT, he can not admit it.