So what you are saying is pretty much every show, is going have pretty much the same sound because that one gigging drummer is playing in every band, sigh boring, gee I wish there was more aux.
There are a plenty of genres of music that require more than one percussionist, and we already pointed out several bands who add aux to their live performance:
The Roots
Eninem
Snarky Puppy
Godsmack
RHCP
No Doubt
Foo Fighters
Steve Miller Band (Before Buffalo died)
Dave Matthews Band
Modest Mouse
Any Latin artist
Owl City (vibraphone)
Police (I count them because Stewart had this multi-percussion set up away from the kit he played)
Any band with a second line
Plus the over dubbing, and prerecorded tracks that are played electronically. I bet various rap and hip hop artists still use more than one drummer. I would say even some older funk have aux percussionists on record at least.
If this is really bothering you, you have a few options:
Start/join a band that has more than one percussionist
Don't listen to music you do not like
Do not buy their product
Write a letter to record labels explaining your feelings and see how they respond
It's like Beta-max and VCR, no one used Beta-max even though it was better quality. VCR won because everyone was using it (for porn).
Replace VCR with drum set only, Beta-max with multi-percussion groups, and porn for listening. Listeners are going to gravitate towards bands with 6 guitarists (like Iron Maiden) before they will listen to bands were there are a number of percussionists.