No, being in care is used for a variety of purposes, and where possible children and parents are encouraged and helped to maintain contact, unless it is determined it is not in the best interests of the child - who makes that decision often causes such consternation and debate, because by the time it comes before a family court judge there may have been a long gap in contact that has done (sometimes) irreparable damage to the relationship.
I remember one harrowing case, it was about 15 years ago, when a 3 year old child had been separated from her drug-using mother who was in rehab 200 miles away, for over a year. Although the court recognised that, based on mum's progress, she would be likely to demonstrate that she had remained drug-free for 2 years if she kept up progress for another 12 months, they still went ahead and placed the child for adoption! Mum fought tooth and nail but it still happened. That shocked me - the social workers at the time were influenced by current thinking that adoption should be swift and children cannot wait too long for their parents to improve. But that was a long time ago - I hope the system is not used so punitively now.