That's banal. Labels are excellent when applied to human beings. It's impossible to get through life without applying labels to people, and ridiculously tedious to try.
I've labelled everyone I've ever met or known. I have a Mother and a Father and a Brother. I've had Bosses and Coworkers, Friends and Lovers, Mentors and Mentees, Accomplices and Foils. It's a rare person who merits only one descriptor, and for that matter many occupy more than one at a time. Most, probably.
What you mean by that hackneyed and rather unctuous statement is that labels are descriptions, not definitions. Any programmer knows you'll get yourself in deep trouble if you confuse reference and referent :)