Your carer has a job.
In that job she looks after girls and boys in a group.
She is supposed to look after all the young people.
A friendship with you may mean that:
She knows you particularly well.
Or she likes you more than the others.
That may cause unrest within the group.
Someone might think
that the carer is being unfair to the other young people.
A friendship should also be equal.
But your carer can make decisions for you.
That means that you are not equal.
In Germany that kind of friendship is “unprofessional”.
that your carer should keep her job and her private life separate.