Socially Isolated People Have Differently Wired Brains and Poorer Cognition

That the development of our brains is influenced by our social environment is not a question of debate -we can now actually see the difference our neuroanatomy. Got me thinking if we can see if, would it be ethical to assess for it? And if not, why not - it really would have an impact on job performance. Furthermore, can we take this information and use it for stuff like personal development? Accessible, philosophical post, kind of meta brainfood.