These are the times I stop and take a deep breath and think we overthink these books entirely too much. But, what else is there to do while we wait for the UNHOLY?
I'll be honest, having been a part of a variety of different fandoms since I was a kid and had the internet (so around fifteen years), I've always thought the same thing. And while I do think it's somewhat true of TSA, it's also one of the very few fandoms in my experience that I think is actually centered around a work with enough depth and content to warrant such analysis.
Part of that is just the quality of works that attract any kind of persistent "fandom" at all -- in general, it's probably going to be something pretty accessible. And if it's pretty accessible, it probably lacks a huge amount of depth (that's not 100% true of course, nor is it a bad or good thing per se, merely an observation).