I am pretty sure I understand why it's done. I just don't think it's a good enough reason for me. I also understand why one would want to use a capo, or a transpose button or whatever.
Between down-tuning and a capo it would be possible to play all night in the key of E, but not sound like it. Cool, right?
Right.
Just because a different type of sound/tuning isn't something that you personally enjoy you don't have to turn your nose down at it. It obviously isn't for you and you aren't making yourself or your opinion look any better by professing how much you know about music if you can't understand something as simple as different tunings.

