You are digging so much into that. Imho people coming to the betting platform not because the platform so cool that they want to make a bet on it. It's because they want to make a bet on their favorite team and looking how they can do it in the easiest way.
People can make bets not only because they want to support their team, but also if they want to earn some money by betting on teams that have real chances to win matches. Some people even learn latest match results and different teams to make a right bet.