You can't have transference and attachment without manipulation. These things happen precisely because the therapist is manipulating the client at the deepest level.

Unconditional positive regard, for example, is hugely manipulative and bizarre behavior. It's a fake stance, and deliberate fakery is by definition manipulation.

I dont see what skill has to do with it. If anything isn't their main skill manipulation?

Exacly what skills should a therapist possess in order to play "let's have an attachment relationship" with a real human being?