I totally agree. My mother is a foster carer and we see our fair share of mothers for all different reasons, drugs , domestic etc. But all the mums have a love for their children and if they dont they still Express emotions (even bad ones).
However sometime there is the odd mother who is just, I don't know how to put it, they're not on drugs, they're not abusive or nasty to children, they come across as an able adult but the mothers bond, that fierce love and a determination to have your baby by your side at all times , is just missing.
These are the mothers that when they say goodbye after a short weekly contact with the child, will simply tell us (the carers) goodbye and not even lean into, or say goodbye to their child. They would just go as if it was any other thing. It's very strange, it's like the maternal instinct is missing.
Again, not bad people, not bad to their child , just emotionally detached. These babies always end up with other family members or adopted because the mother was just not capable of making adult choices.