All true, but it also has to serve the purposes of extended plot and (I assume) extended use of the actor playing ward/hive. so though his motivation is to convert everyone there could be attempts to figure out a way to affect humans that fail, leading to a bunch of people with out of control powers for them to hunt down next season. if it were me i'd have the next couple episodes where there are failed attempts and then have him and all the test subjects, one of whom was a success, escape in the big finale showdown. they could then have a main arc next season of trying to stop hive from converting the human population with individual episodes where they have to stop the failures.