I don't think you need to be afraid of a healthy attachment. It should be present in every human relationship. It's not just for relationships with therapists.

If you want to form healthy relationships with others in your life, it's safe to work it through with a therapist. Kind of like practice. Or so the thinking goes.

I wonder if you are confusing healthy attachment with the strong transference or negative attachment we hear about on this site.

No man is an island etc.