Doing this while the runtime learning is not yet developed means unleashing the equivalent of something between a toddler and young adult without the ability to progress through those stages before potentially causing harm.

Though as someone with a very anti-brainwashing upbringing (no political biasing, just politeness and correctness reinforcement) I can say that even with amazing conditions of being wanted and loved, an agent could develop such painful shame as to be dangerous and may or may not grow out of that as I did, even with such mechanisms to do so.