Oh, Inpraiseof. You poor, poor fool. You've fallen into Ian's trap.
You can tell a passing fan of Tull because they've heard Thick as a Brick here or there.
You can tell a fan of Tull because they've heard Thick, but can't figure out what it's about.
You can tell a Tull fanatic because they think they've figured out what it's all about.
Now, a Tull die-hard realizes that Thick was created when EVERYONE said that Aqualung was a concept album, but Ian kept denying it, so finally to, please everyone, he created Thick as a Brick.
Thick as a Brick is meaningless. That's the point! It's ole Uncle Ian's way of saying, "Oh, you want a concept album, eh? I'll give you a concept album! I've give you the mother of ALL concept albums!!!" Why do you think it's credited to that 12 year old?
Of course, there's also the psychotic fan of Tull. Those are the poor souls who understand that Thick is a put on, but still believe that it has some deep inner meaning.
...Seriously now Ian, it's about the death of childhood, right? Where the hell is Biggles? The poet and the painter? Dead of childhood, right? Throw me a bone!!!