I will preface my comments here by saying that I have every respect for doctors in general, particularly those working in the UK within the NHS with everything that brings, and particularly now that somehow they are being demonised at every turn in the media and by ignorant fools on social media. I'm also grateful for this thread, as it it interesting. And finally, I don't think that Googling stuff (or even a bit of direct knowledge) is a substitute for years of training and experience. Ive got close friends whose medical training I observed over a long period and my general view is that they all could've earned more money, far more easily and with a lot less personal risk (and inconvenience - years of being dumped in placements in random hospitals!) doing almost anything else.
So please bear all of that in mind when I say - for the love of God, this appears to be an ignorant response! Childhood trauma and neglect are not purely a matter of what the child consciously remembers! Neurologically speaking the effects are baked in for a lifetime, and this takes a massive toll which parents of adopted children almost all have to deal with (and I assume that's what the other poster is, given the way the question is worded).
I have no medical qualifications whatsoever but, like most adoptive parents, have done a lot of learning on this subject in the four years it took us to become adoptive parents and the two years since. I'm sure you'll be aware of the work of Bessel Van der Kolk (The Body Keeps the Score - Wikipedia) and others on this, so are you in the camp of contesting it?
I'm not pretending to understand either the psychiatry or neuroscience of it personally, but I will say that there are many, many adoptive families who have adopted their child at an age way too young for conscious memories whose children struggle extensively with the effects of the trauma and neglect inflicted upon them, even those for whom alcohol and drugs in utero can be excluded as an obvious cause/ contributing factor.
I'm immediately depressed whilst also still being very interested in you expanding your perspective on this (I recognise you have said elsewhere you don't work with children, but children with trauma become adults with trauma.. especially if they can't get the help they need as children, which most can't at the present moment in time, in the UK - and in most places.)