I think we're no different than any other sport, really, when it comes to taking things more/less seriously.
But I think cycling has more of its population in the middle-serious range, if that makes any sense. For instance, I'm a middle-range cyclist and I'm also middle-range in a couple other sports. The work habits I developed as a cyclist were not present in those sports. Nobody watches what they eat or when they eat. Nobody stays off their feet between games. Nobody practices the fundamentals outside of competition. Nobody hydrates during games. Yet if you were to ask them about their level of dedication, they would all claim to be serious about the game. And for many of them, that was the only sport they play and they play it 4 or 5 nights per week.