I know the experiment. It was very cruel experiment, although taught us a lot.

Yes, psychological disorders and cognitive underdevelopment is directly related to unsustainable upbringing. I consider the above knowledge fundamental for everyone like cooking.
I think that every adult who plans to have a child should go through meticulous parenting education course where they would learn relevant knowledge such as above. Also every "want to be parent" should go through process of psychological counselling or even therapy in order to solve their own psychological problems first. This would help to prevent mindless parenting and proliferation of suffering from one generation to another.