Leah you have a lot of insight into your own self and triggers from the past. After reading what you wrote I thought 'wow', you have gained such positive things from this experience. I don't think letting your T care for you be reading will do damage, I think it will heal the little bit of you that needs that.
I wonder too about becoming a helpless person and that this T journey will bring up more then I can handle. But in times like that I am reminded that I've already survived the past- so bringing it up now won't kill me, it might hurt but I've done it before (and this time I'm loaded with a great T - sounds like you are too). And like you said it could be good to be interdependent then strongly independent - this is also a struggle for me. But remember you've been independent so long it will take time and patience (with yourself) to make that shift.
Thank you for sharing! I can't help but retread it and see all the positives and self reflection you have gained. Well done!!