Let alone many users envision this as an audio utopia, where EQing the ride has no effect on the Tom, or EQing the snare or bass drum has no effect on the other .. thenthrow in hihat <grin> If you don't think a typical hihat mic affects the snare and vice versa, well .. they normally sit pretty close together and would be really hard to isolate.
To get exclusive drum control you would need to use MIDI .. cause when you record drums, bleed happens.
You are going to hear the snare and BD on every mic .. it just happens.
So you EQ the snare, and now the snare that is coming through the crash mic has changed .. and then if you you throw some reverb/gate onto them, things can compound and get all haywire real fast

Suddenly the hihat is louder only while the snare gate is open ..
Drums ain't easy, and PGMusic does a pretty dang good job on them for the purpose right now. To answer Simon's question up a few posts
How many mics would you want on an "expanded drum track"?
The above shows why that is really a case by case scenario .. but if I had to pick a number I'd say 8 (just from experience)
snare
hihat
BD snap
BD boom
overhead for cymbals/toms (panned)
overhead2 for cymbals/toms (panned)
ride bell
center
that would be my preference on a basic kit