it doesn't make sense if read in a linear fashion without relying on majorly shaky interpretations — as in, the kinds unsupported by the source text. the thing just isn't arranged logically and can't be followed as such if one is attempting to make any kind of sense from it. how could it be? the songs were placed according to an external brain disconnected from the meanings of the words and statements.
TNF and ILFTJYF are across sides as well, so they're separated like ED and "Pilgrimage." and i agree; kinda wish they'd put out multitracks or at least instrumentals like with TDS so we can have a peek anyway. i've taken the time to 'crop out' all the songs and while some are easily done ("The Fragile" easily splits away from WITT, as does the end of "The Wretched"), some have to be edited enough that you start to wonder if it's really equal to hearing the song pre-sequencing.
i was surprised too when i first saw it. evidently the track has an important perspective on the work as a whole; to be honest, it took me about a decade to even like the piece, so i've been thinking for a long time that TR must have had serious intentions behind including it but not including "10 Miles High," which is easily one of my top 10 favourite NIN songs. it's clearly more important as a statement... but what that statement says, i'm unsure. it's interesting, however, the way that it begins with distorted guitar and this grand machinery building and collapsing, then falls into this completely out-of-place and bizarre marching band (makes me think of the Sigur Rós song "Sé Lest" live, wherein the marching band at the end of that song walks right across the stage as they perform the music). the familiar NIN sound falls into total, dark absurdity — sounds like all of The Fragile to me, in a way that lingers.
never really thought about that, but you're right, the Left disc is structured quite a lot like a traditional album (though TDTWWA obviously fucks with the way the dynamic is 'supposed' to work, where the second song is usually an energetic single, and that song is... well, it's an un-song, really — funny that the Right disc actually performs this same sequencing function 'properly' but is considered the weird disc!) while the Right disc has a stranger feeling. however, i find the 'otherness' of that side is sourced in the way it relates to the Left; there is a sort of mirroring in the way they begin, with SD and TWOIT having a similar build-and-release linearity, but then the discs veer off in vastly differing directions. if TR had released the discs separately like Radiohead did, how would the Right disc have been judged differently? with distance between the releases, would the tracklisting of Right have changed, or included 10MH and TNF? what would it have been titled if Left would presumably have kept The Fragile title?