What if one of the random infants they gave it to became stronger than Homelander (everything that he has but more powerful) and decided to kill everyone on the planet when they grow up. There would be nothing they could do.
What is there selection process exactly, do they know what powers someone is going to get? I don't think they know, because in Gen V there where mentions that some powers weren't marketable/profitable. So if they could control it or know beforehand, why would they let the undesirable powers manifest or even happen to begin with.
Vought have gotten lucky so far that the supers have been mostly stable and not world ending beings.