From what I've seen (anecdotal, yes), the large bulk of fans tend to be casual. They root for the team, but don't follow it intensely. They simply either don't care enough to dig into the deeper stats (math isn't exactly a well-loved combo with hanging out watching a game for most people) or don't have the time. So they go largely off reputation, what they hear and which players seem to be trying hard at the times they watch. I don't think it's as much intentionally avoiding stats as it is not feeling that sports is an important enough area to focus large amounts of time pouring over numbers. From what I've seen, the majority of fans who would identify themselves as die-hards are also stupid. Intelligent people don't have time to be heavily invested in sports, we're just the suckers