I just saw the video from Kursgezagt on Loneliness and it points out the biological reasons for social interaction, it also points out the reason we experience social pain in loneliness, basically, because in the recent past (a few hundred years ago) isolation meant you were very likely to die so our bodies and brains adapted to know when the circumstances of this dangerous situation emerged.
This immediately made me think about the disfellowshipping and social isolation that JW’s practice - it’s basically abusing our own evolutionary biology against ourselves and puts you in a cycle of loneliness, depression with the only ‘cure’ going back to the acceptance of the social group and accepting their ‘quirks’.