gee... i learn a LOT here, lmao...
let me keep track in my notebook now...
(scribble scribble) "genre... is... meaningless..." okay, okay...
(reviewing previous notes) "music theory is crap... scales mean 
nothing... just randomly pluck and plink notes until "something" 
pops out o the ether..."
what else, what else? OH, yeah... "reading music is useless... 
writing scores is for losers..."
		
		
	 
That's good.  Not sure how much leg pulling you're doing but I 
suspect it's 99%.
I can tell you this from my studio experience...
Genre is very important.  If the producers says it's a honky 
tonk tune then you better know what that means.  West 
Coast Swing, samba, rhumba, mambo, dixieland, baroque 
are all genres.
If the chart you're getting ready to run down is in the Nashville 
Number System you need to know theory.
If the chart says "solo" you better have a grasp of the scales 
and know what the chords mean.
Reading music is at the top.  If the arranger has your guitar 
part doubling the fiddle you need to know how to read.
I had a gig that required me to sight read an Aaron Copeland 
piece I'd never seen before, or since.  Thank goodness I could 
read and had a concept of his genre.
One thing is for sure, I've yet to walk into a session with TAB 
sitting on the stand.  I think TAB has a place but it's not a 
substitute for notation.