For me, there is a big difference in Runcible's message from her therapist as opposed to a generic I care about you statement. In Runcible's case, there is a 3 year + history with a therapist who has very carefully considered their interactions over time and has waded into territory that most therapists either won't or can't do (such as examining their own motivations and responses).

Also, I don't think many therapists would write this at all--except maybe an I care--and it especially strikes me as meaningful because the one Runcible has been seeing just doesn't throw things out there.