To use another example: if I explained your behavior in this thread by claiming that you are a narcissist who holds yourself above others and so feels they have the right to (verbally) punish others, has trouble seeing any personal faults, and easily sees character flaws in others, that would be an ad-hominem. I have not done that, because I don't know you and your motivations, it wouldn't be constructive, and most people aren't narcissists. But similarly, most people care about their children, and arguing that they disagree with you because they don't care enough is not constructive.

It’s kind of funny, because ad hominem is exactly what you yourself are doing. You aren’t objecting to the substance of any of my points—you’re just complaining that I wasn’t considerate enough of everyone’s feelings in my delivery and that it makes me a jerk. Even a narcissistic jerk apparently—pulling out the big guns!

I also never said that people who do sleep training “don’t care about their children” and it’s rather dishonest for you to keep repeating it. I think there is often a self-absorption issue which is encouraged by our culture, but it’s not the same thing.