mmm.... well... That is only partially true.

"adult" music is a charged statement, heh!

There is a right tool for the right situation. Sometimes the mind is in the mood for something primal and sometimes something complex or subtle or whatever the case might be.

If you want to go dancing out at a club and your only two choices are Jimi or Jazz, you're doing it wrong. There are parts of the brain that want to hear Sex Pistols and then John Coltrane, then back to Dead Kennedys. Sometimes a simple two note power chord is the right thing to play and other times a speedy scalar run fits the bill. Many people get snobbish once they finally understand that there is more to making music than those two techniques, but everything has a place and time.

Take care!

p.s. I bet you'll revisit some old favorites someday!