What the author is describing sounds a lot like idolatry.
I'm not sure I agree in general, but one of the roles most associated with intense parasociality is literally called “idol”, so there's that.
That's a really good point.
We pray to gods and make sacrifices to them but generally do not interact with them directly. It seems to fit squarely in the definition of parasocial.
I'm not sure I agree in general, but one of the roles most associated with intense parasociality is literally called “idol”, so there's that.