Devil's advocate: arguing the case for "killing with kindness" from the perspective of being on the receiving end
(A situation that exemplifies its benefits when dealing with troubled children)
When I was 12-14 I had some emotional and behavioral problems due to being surrounded by negative situations: abuse from every 'inside' family member, different types of neglect (especially emotional), being bullied and a social pariah at school, unsocialized / extremes in childhood isolation (kept away from extended family members, unable to form any real friendships with peers due to parents' excessive/extreme restrictions/limitations, etc), and so forth. On top of all of that was the onset of what I would later discover was bipolar disorder. My parents were both narcissists (mother covert, father malignant) and my brother was also abusing me secretly...which meant I really wasn't being shown love at all whatsoever, by anyone, as these were the only people I was able to really spend any quality time with. I didn't know how to cope, nor express my emotions properly, so it ended up messy once I was "safer" (away from my father) and everything that had been repressed/suppressed all those years finally erupted. In response...no one really had the insight to realize I was in so much pain as a child. There wasn't anyone who bothered to reach out to me lovingly--instead, it was anger, discipline, character shaming, and so forth. No one was perceptive enough to realize that if they'd just tried to maybe listen, have understanding, and empathize with me, my defenses would've melted right down and I could've been taught better ways to release, process, and cope with emotions (I was not able to express or experience feelings at all whatsoever when I was living with my abusive father, thus I was clueless). Unfortunately, my malignant narcissist father eventually did perceive that need--and that resulted in me gravitating toward him, being manipulated and brainwashed into becoming his narcissistic supply / enabler, and becoming unable to see that what he was showing me was just more abuse under the guise of love, not authentic love. I didn't fully wake up until I was around 28 years old and several facets of my life--finances, career, basic survival, social, psychological, and whatever others I'm not thinking of--suffered massive damages, some of them irreparable and permanently life altering. If any single one of those healthier adults would've shown me kindness, softness, gentleness, etc. when I was a child, my life could've been entirely different. It could've saved me from years of hardship and damages I've had to repair, and damages I can't repair, simply by reaching out to me and being an example of what real love is supposed to be like so that I would've been able to recognize the fake abusive versions and therefore not accepted or been deceived by them.
I personally have the issue of being overly soft in my parenting style. It hurts me to have to discipline when I'm in a parental role (either with a partner's kids, or with my cats, or whatever). I can't fucking stand resorting to discipline with them. I realize this can be harmful as well, however...and I want to be able to better discern when which course of action is more effective.