I think it can depend on a therapists psychotherapy approach- is she CBT, psychodynamic, eclectic, person-centred etc? It could be the way she was taught, it could be her own boundaries. There are therapists out there willing to fill that need, they recognise it and have no problems with it and are quite comfortable with it. Mine for example. So i know for a fact it exists out there.
And you are right, you will need to decide how important it is to you and if your therapist just now can provide it. I hope she can.