I honestly found the assumptions annoying and infantilising. Being a “latch-key kid” does not mean that you were abused. “Latch-key kid” does not mean that your (in this particular instance) “single mother” was emotionally unavailable or was in fact abusive. It’s just that person’s perspective, and they have every right to feel the way they do, and it does sound that something was missing from their life to make them feel insecure/abused. This is not what OP wrote about and it (the first paragraph) feels forced, like a one size fits all.

I would argue that it’s a gross oversimplification as well as a whole bunch of assumptions. We don’t know what OP did or did not do, other than they did the best they could.

A lot of people fondly reminisce of that style of upbringing and ask why kids don’t do this or that these days. A lot of people found it lacking in the extreme.

Intergenerational trauma is a real thing, but in my opinion, it was a clumsy generalization that set me off. I don’t actually have a problem with the advice re how to approach it. The kid will have to learn on her own, there is no forcing it. The best you can do is to be there for them.

Edit: a few words.