I don't think it is an assumption, these are people for who Arsenal is a ritual like going down the pub on a friday night or taking the kids to the park on a sunday. It doesn't say any more or less about them, and i'm not saying it's a majority but there is a sizeable proportion of the crowd who come win, lose or draw, go home and don't think about Arsenal again until the next game.

Does it mean they don't have opinions on the direction the club is going?.....it just means that outside of a coffee break in the office they probably don't spend a great time on social media/forums talking about it