I so relate to this. My T is 65 and due to my job move, we now do phone counseling sessions (not ideal, but for those here that know me i'm a "lifer" in therapy, pretty much)

Both his parents had dementia. So The age thing is understandably worrisome. However, most likely this fear is really about re experiencing loss and wanting to avoid it. I have been worrying about his dying since he was in his 40's.

I'm trying to explore options out where I live now "just in case"--I have a health-only counselor who I have been able to express my fears to, as my long-standing T doesn't want to justify my irrational (to him!) fears

I suspect his pride keeps him from being able to admit he is getting older

If your T is willing to discuss your fears, maybe it is worth exploring

and thanks to whoever brought up the professional will! I'm a bit relieved