Not at all. The point was, this guy was different- different enough to notice, and to get our attention. The disappearing act was icing on the cake.
Remember, we were out there looking for people to help. The fact that this event happened was confirmation, to us at least, that God was watching, and that He was involved.
I do believe in higher beings.
I just think there is no reason to assume every nice person must be something other than human. It gives a very strange impression of the human race...