Is there any contradiction between these two? This is a tough one.
How can we be anyone else? If I am not self-confident, I am myself. If I am doing what others say, I am myself. A follower. If I am faking my personality, I am myself. A faker. What else could I be?
My body is not me. My mind is not me. My name is not me. So, who should I be? What is that “I”?
Faking, imitating others is a natural process of learning in any field. Being yourself is following your deepest values. Two different things. If one wants to fake – let them be themselves, let them fake. Why pretend to be a unicorn?