I’m pretty sure the commenter you responded to agrees aggressive people are a liability and that’s the problem with current hiring(or at least the hiring contemporaneous to when they heard this).
From my own personal conversation with a hostage scenario trainer for the police, he said de-escalation forms only a tiny percentage of his training because that’s not what the cops want, even though he would make that the majority of the training given a free hand, since de-escalation doesn’t just increase the chances of the hostages being safe, but also the cops and the first responders.