I didn’t come here for a hair cut
You're not there for the extra stuff. You're there for the main event. If you don't get it, you're going to be very angry.
He showed up at the party and said, 'I didn't come here for a haircut, I came for the drinks.'
The kid walked into the class and said, 'I didn't come here for a haircut, I came to learn.'
She walked into the restaurant and said, 'I didn't come here for a haircut, I came for the food.'