Born in's, perhaps, have little or no choice and accept ( sometimes reluctantly, sometimes complacently) the safety and comfort of family and social environment.
In my experience I have seen certain 'company ' elders adopt youngsters and 'groom' them to accept and follow the JW doctrines and traits.
Those who 'convert' ( myself ..) differ in that we actively chose to convert and leave the outside 'evil' world, depending on how good our mentors were who brought us in to the 'Truth'.
In both cases, the person who is convinced, against his will , remains unconvinced still... a ticking timebomb...