You are probably correct in everything you say, Greg, but that doesn't mean that his behaviour was 'right'.
Is it so much to ask of a police officer to at least try and help?
If nothing else, he could have calmed the situation and explained to the cyclist how best to report the incident.
In an age where police officers get a rough time and have serious pr issues, taking the time to help a road user that claims to have just been hit is a reasonable expectation, in my opinion.
I also think that this situation could easily have escalated. If that was a young man driving, for example, might his patience with a cyclist shouting at him been pushed to the limit? Might this have turned into assault, with or without the vehicle?
I think the police officer could and should have done more.