This 3 minute song creates a fleeting portrait of a man, not necessarily Bieber, who we cannot know. The song captures the mindset of a character who, one might infer, cynically knows what he’s trying to do. It’s possible he has no interest in a heartfelt, meaningful apology. In fact, this character - who lives only within the song and the liminal world it creates - may be operating exactly to his own moral preference. We don’t know enough to say more. It’s like asking if a singer of “happy birthday” truly wishes their subject to be happy.
In short, you Kant analyze pop music with confidence.
Of course one cannot in all sincerity know. Today, and even yesteryear, are composed to entertain others, not oneself. They are seldom personal or about the singer, with exceptions like the well known songs by Carly Simon and others. In any event songs today are often written by others, passed around till they find a “home.”