I don’t think they purposely try to control people, it’s just sort of happened that way.
For example, one of their most powerful means of control is their effective stigmatisation of higher education over many years. This has contributed significantly to a compliant and ‘thriving’ religious community, compared with many other declining religions.
But did they sit down one day and say to themselves, ‘if we ban higher education then they will lack critical thinking skills and they’ll do whatever we say’? I don’t think so. I think they genuinely believe the end is near, that higher education is a waste of time and/or is corrosive of faith because of morality on campus and because of the secular ethos. I think they really believe those things. So to the extent that this apparently results in high level of control, I don’t think they are being Machiavellian about it, it’s just a natural consequence of their genuine attitude to the world and them advocating the same to Watchtower members.