This is more specifically the assumption that a computer understands and more importantly cares about what you are saying, and maybe also you as a person. This assumption is obviously wrong for the computer, but also usually wrong when interpreting responses from an actual therapist, or any other human, so no difference really.

Why do you mention computers? In what way is it that actual therapists are like any other human? What does that suggest to you?

I see what you did there ;-)

Tell me more about what you did there.

I built a simple chatbot that uses GPT-3, which can be very convincingly human at times, so I can understand the tendency.