As someone who struggled with and had to ‘first principles’ social skills, I feel this even in many mundane interactions.

People wear masks all the time because sometimes their true self is not conducive to what they are doing at that time.

For a celebrity entertainer who needs to appeal to a crowd of tens of thousands, their Dunbar’s number, even optimistically, will be orders of magnitude smaller.

Therefore, the gap of inner circle-audience will be made up by an act relying on their ability/looks/charm which is necessarily contrived and not reflective of their true self.