To me thats evidence the basic construct is faulty. One adult regresses to the role of "baby" and attaches to another adult playing the role of "parent", who knows what to do by way of training... these things work in the proper context, but in a laboratory setting?

Also what good is it to become attached to what is basically a non-person? Even if some real feeling of connection develops, the feelings are directionless and it's a dead end. It's a relationship confined to a little box. This alone could destroy a love-deprived person. It's the weirdest sort of cruelty.

I contend that whatever good comes from these things is in spite of the quagmire that is therapy, not because of it.