I deal with this all the time. One album might sound great with both bass and treble cranked up, while another one will be waay too boom-y and I have to trim the bass down to the middle.
If some standard were agreed upon for frequency response through the chain of elements (mics, processors, monitors, etc.), then listeners would be able to set their EQs to what they like, and leave them there.
Of course I'm over-simplifiying a bit. Different artists/producers/engineers will have different subjective opinions on the "right" mix, but at least there wouldn't also be an additional complication of the variety of monitors and studio equipment settings lurking underneath their adjustments.