By you not being the fullest expression of you possible, it is like a kind of robbery.
Not only do you rob yourself of potentially great fulfillment, you also rob others of potentially great service. In fact, you can even do harm by withholding this service out of fear, lack of self-esteem, or self-doubt.
Is that not a compelling reason to cast aside worry and doubt in favor of truth telling?
There are those who are patiently waiting for you to be you.