To quote Heinlein again:A better example might be from that article with the woman teaching her sons that the best way to intervene in situations (violence, bullying etc) is with words, or to just submit or walk away. This is just remarkably blind to reality. One main reason violence occurs is precisely because words have no effect, submission leads to more bullying, and walking away doesn't work when they chase you. All of those are fine first approaches, but you need to address what to do in the very common instance that they just don't work. I suspect her sons have a much better grasp on reality than she does.
"Violence, naked force, has settled more issues in history than has any other factor, and the contrary opinion is wishful thinking at its worst. Breeds that forget this basic truth have always paid for it with their lives and their freedoms".
Intellectuals have spent centuries persuading their civilisations that violence is pointless and ineffective, yet nations still have Armies.