The absence of punctuation in the OP caused me reading fatigue:))
Aside from that, if the music in question is pretty much any genre outside of acoustic music, recorded since the 1970's, what we are listening to is, in fact "the sound field as it originally existed", since that sound field was created by the engineers of the recording.
Listening to music is a cognitively complex process, so it's hardly a revelation that the increased musical information provided by a stereo recording caused an increase in brain activity.
The logical fallacy is in the speculation that more brain activity = listening fatigue.
More brain activity might equal more pleasure.