You are correct, but conflating two issues. The issue at hand is goal oriented social behavior, which is one end of a spectrum. At the other end of the spectrum

You are correct, but conflating two issues. The issue at hand is goal oriented social behavior, which is one end of a spectrum. At the other end of the spectrum is what you accurately describe, differentiating private and public self. Another helpful tip along these lines is don't arrive at parties nude ...well at least not unless that is explicitly required.