CHOO CHOO CLUE TRAIN IS ARRIVING TO PLATFORM YOU ARE A FUCKING IDIOT (lmao)
1) ever heard of resonant room frequencies? of course you haven't because you don't know the first fucking things about acoustics and sound theory! gee! see, every room has at least one or two frequencies at which it self resonates causing these frequencies to be boosted. it does NOT sound pretty because it might mean that a guitar, for example, will sound louder when playing a certain note than other notes. how do you fix this? GRAPHICAL EQUALIZER!
2) holy shit what the fuck. do you think everyone listens to music with a pro grade cd player into active genelec monitors in an acoustically "perfect" environment? 'course not, silly. people use shitty shit shit shit "compact" systems with X BASS BOOST and JAZZ/ROCK/POP/DANCE EQ and FLASHING LED DISPLAYS and shit shit shit. people have absolute SHIT systems. there is NO WAY IN FUCKING HELL that those have anything even REMOTELY RESEMBLING flat frequency response. not in any of the amp stages, not on the speakers, nowhere. what you get is a mangled mess. using graphical EQ or indeed any EQ at all to try and make sense of this fucking mess can VERY WELL be an improvement.
3) why do you think every sound engineer makes it a point to listen to a finished mix on different systems (fucking 80's boombox! fucking radio shack $20 compact taiwanese BASS BOOST system from hell! fucking $20000 audiophile setup! fucking $1000 genelec monitors and $2 earbuds and kitchen radios!) right. because there is no such thing as "perfect frequency balance" or whatever fucking bullshit you dreamed up without knowing SHIT about the subject in any home listening environment.
the goal of the sound engineer is generally this and this only: to make sure that the mix sounds AS GOOD AS POSSIBLE on AS MANY SYSTEMS as possible. this does not mean that if you know how to make it sound better, you shouldn't because EQ'ing is somehow a divine art that mortal men can't comprehend. i go to sound engineering college, and i think you should go fuck yourself.