Jimmy Chamberlin and Umphrey's McGee

Kicking off the music portion of the Groupon Arts Collaboration Series, here's Jimmy with Umphrey's McGee at their recent performance;

Question

I don't quite understand why it seems at times to be accepted by 'a general listening public' [e.g. not musicians & certainly not drummers] that whilst the rest of a given band plays note for pretty much note what a song is [as defined by a recorded version of it ] - whilst the drummer plays what amounts to degrading, say 'Asturias', into power chords (with half the strings missing) and yet that, that seems to be OK with them?

Whyyyyy...

Mixtape Madness: Songs That Should Be On the Smashing Pumpkins Reissues http://www.deathandtaxesmag.com/152708/mixtape-madness-songs-that-should-be-on-the-smashing-pumpkins-reissues/

Gish and Siamese Dream SPECIAL EDITIONS

Pre-order @ Smashingpumpkins.com

Here's hoping Billy hasn't done a George Lucas

Buy Jimmy Chamberlin's Zwan Kit

http://www.ebay.com/itm/Jimmy-Chamberlins-Yamaha-Maple-Custom-Absolute-17pc-Kit-/230688035078?pt=LH_DefaultDomain_0&hash=item35b6141106

Jimmy Chamberlin's Yamaha Maple Custom Absolute 17pc Kit

Tom Sizes:
5.5x8
8x10
9x13
12x14
15x16
16x18
Single Headed Toms
5.5x8
6x10
8x12
8.5x13
10x14
Gong Bass Drum
18x20
Bass Drums
18x20
18x22
18x24
Snares:
5.5x14
7x14 (Elvin Jones)