I've not read all this long thread, but I'm thinking that's what a therapist would say to a patient with borderline personality disorder. Realistically it means as long as they are the patient's therapist, they will be there for the patient. I don't think it's a good idea for a therapist to say that because they can't promise that. What if they die, need to leave the area, have to refer the patient to someone else, etc.? The patient would possibly see that as abandonment, I'd think.