No Such Thing As Adult Emotional Abandonment

I listened to a recent-ish episode of the podcast- I think it was on emotional manipulation- and Brooke made a comment that there is no such thing as adult emotional abandonment. While on some level I understand this, I wonder if there isn’t a developmental prerequisite, beyond simply an increase in age, that enables one to transition from a child (whose nervous system has been shaped in circumstances of repeated abandonment/intense volatility/chronic invalidation) into an adult with the neurological wherewithal to access a sense of fundamental well being. How do we move into more than an intellectual knowing of our okayness, if our dysfunctional circumstances have just continued from childhood