Again, cart before horse.
You’re asserting that there are no helpful cops, therefore Harry being helpful means he should not be a cop.
In reality, Harry being helpful should be a cop, because he could be in a position to help people.
Dexter/Batman don’t do a lot of helping, they just crack skulls of people they perceive as bad. Ironically for your point, much like most IRL cops.


I really don’t know if what you state is accurate because I don’t recall from reading the books or watching the movies, so I can’t really comment on your prediction, and honestly we’re so far off-topic I’m barely interested in developing an opinion on it.
I just generally disagree with “Fred and George were better contributors to the resistance than the Trio,” for reasons stated above.