oddly enough I think that largely isn't even because of it being bad at replicating the aspects/components of normal headshot selfies, but because the training data for selfies and headshots pulled from model agencies, ads, social media sites, etc. are full of heavily-filtered, and heavily-airbrushed edited selfies because of the terrible culture around beauty standards and the poison of social media vanity that it agglomerates the 'abberants' like this

Dat clavicle