There's a difference between enthusiasm and obsession, and I'm pretty sure there's a difference in how you object to enthusiasm vs. obsession. "John&Paul&George&Ringo." is a great T-shirt. "I spend all day in my bedroom listening to the Beatles" is saying something very different. And if there is a subculture of people who literally do the latter, to the point where it's not obvious that it's hyperbole, it's valid to object to it as "Dude, that's a bit unhealthy" -- which is a very different criticism than "The Beatles sound awful".