i swear all social media, including imageboards, is mostly pseuds desperate to belong in a group. summed up best in the sentiment "its okay to be a fan of something without actually knowing about it"
just in 4chans case,
go to /v/, nobody plays video games
go to /o/, everybody rides the bus
go to /tg/, nobody has a party or goes to the LGS
go to /out/, everybody stays /in/
go to /fa/, nobody has any sense of style