I wasn't at the recording, the mix down or the mastering sessions, but I'm going to speculate. What you hear is exactly what they wanted the song to sound like. Dense and loud. Kind of like an assault to your ears. Reducing the stereo width lends to this effect.
Steve Lillywhite was the producer. Compare it to his work with U2.
Steve Lillywhite was the producer. Compare it to his work with U2.