It's like working for a sales organization where you are rewarded for how many hours you chat on the phone rather than for how many sales you make. It would make more business sense (where the business is selling religion) to reward JWs who get new people to the Kingdom Hall, rather than reward those who record many hours and harass those who record less time.
Mind you, I guess returning a 'converts sheet' showing zero success month after month could get a bit demoralizing.