I was playing devil's advocate to some extent - I'm sure there is someone who could do the job. However, I think it's disingenuous to say that 'reformist NYC police commissioner' would be any kind of a cushy job.

Obviously if you don't care what happens, and have the force of will required to lead one of the largest militarized gangs in the world, it's not a terrible job. But that's not what is being asked for and the person who replaces Tisch is going to be under a lot of direct and indirect pressure from people who enjoy violence.