Those birthing those Balancers and Watchers would not be able to understand what kind of life they had brought into the world, and what they were expected to do, so there would be many who would reject them the moment they started to show strange signs.
There would be others who would live in fear of their child being discovered and taken away to be dealt with by those who were hunting the Balancers and Watchers.
While some hunted the Balancers and Watchers, some wished to use them for their own purposes.
Some wished to control them and put them on leashes so that they could be used to fulfil their goals.
Others wished to use whatever methods they could to try to extract a method for them to gain those types of powers for themselves.
Humans have always had a long history of wanting to control things that were beyond their control.