However much we like to run away from the fact, academic performance has a strong correlation to performance in the real world, especially when it comes to reasoning out things. Hence why those who won businesses employ clever people :-)
Good example is the rules deployed to combat traffic in Nairobi. Mombasa road matatus are not allowed to use any other routes besides Mombasa road and Uhuru Highway to get to town. This remains even if there is a tailback all the way to General Motors. It's normally faster to approach town via Lusaka road and Landhies road due to fewer roundabouts an dteh fact that the matatus are all headed to Railways or bus station.
That's just an example, but do remember criminals are also clever, and will engage police in games of wit.
The running in recruitment of police has lead to one positive result - Kenya Police is the top institution globally when it comes to producing top performing athletes.
As for saying that some police officers are there cause of passion - many who would like to be police officers are not because of the lack of incentives and poor selection. This is what I ma pointing out which you are defending, thus defeating your argument.
We have to accept that we put people desperate for a job because of unemployment in the force, rather than people who loved to be policemen.
The sooner we accept that there are better ways of recruiting police officers, and we give them incentives, we will have a better force and safer country.