The importance given to the judgment of others is certainly an innate reflex. Indeed, in prehistoric times when Man lived in small communities, being expelled from the latter very often meant death. It has therefore long been beneficial to survival to adapt its behavior to the norm of the group in order to stay there, to enjoy its physical and food security.
But today, this reflex is no longer as much an asset in a world where we are constantly comparing ourselves to strangers who have nothing to do with our community group. Copying their behaviour is no longer essential to survival, on the contrary it can sometimes be harmful.
To succeed in getting rid of it is to free ourselves from the superfluous but also from what can make us unhappy or sick as seen in this doc that parallels social networks and anorexia.