Slight semantics here - It is a ‘myth’ that police are totally unable to be involved in pursuits with moped riders with or without helmets regardless of the circumstances.
It has however always been the case with any type of pursuit that a decision is made around the risks involved to public...
I’m afraid that to a degree it is true. Depends on the sort of offending they have been involved in but for most lower level incidents there won’t be a pursuit.