When I had my babies many years ago I refused the blood test that could show a higher likelihood of the mother carrying a baby that had Downs Syndrome. The midwife asked me why, as it was just a blood test. I told her that my reason was that even if I was having a baby that did have DS I wouldn't be aborting it, and that in fact I considered being pregnant with a baby that has DS as very much a blessing. Of course whether or not a child is NT, they can have all sorts of challenges in their lives, and on rare occasions a child with DS will have severe health problems, as will NT children.
As a student nurse I had a placement in a large house on a normal housing estate, that had been turned into a home for adults with various different, but very severe learning difficulties. One of them had an issue with always chewing at her hands, she eventually, very sadly, died from Septicemia. All of the adults in that home had been given up by their birth families, I didn't know all of their histories, but some had been given up at birth, and others at different stages throughout their lives. I did not - in fact I could not - judge their parents. These were people who had hardly any way of communicating how they felt, and all were doubly incontinent. I loved being able to help look after them (although I hated the small letter politics of most of the staff in that place) but with the best will in the world I would struggle to understand how someone could think that they were blessed to have a child born with such serious disabilities. Those often dreadfully painful conditions, that appeared to offer very little, to no quality of life, could not, in my opinion be a blessing to either the child or the parent. However, I did consider myself to be blessed to have even that small chance to get to know, as much as was possible, the soul that inhabitated that body, and for me to be able to in even small ways, get to show them some affection.
An example being the young lady who later died of Septicemia. She couldn't tell you what she wanted, but if you sat down she would try to climb onto your lap for a cuddle (I think she was about 25 years old then and I was about 34). I was told in no uncertain terms by the other staff there that I must not let her climb onto my lap. The reasons they gave were that a) it wasn't appropriate, and b) she wasn't the most hygenic of people - basically if any of the residents had a itch anywhere on their body, and they could reach it, then they would scratch it, but that is just how it is with people who have such severe learning difficulties, but with the mobility and strength of an adult. Anyway, when I was sitting down and she tried to climb onto my lap for a cuddle, I couldn't even gently push her away, or stand up and walk away - she wanted a cuddle, and even if I had been sacked for breaking safeguarding issues (not that they were ever referred to me as that, but I wasn't stupid, and I had children of my own, so I was well aware of what dangers any of those residents could be exposed to, and in danger of being taken advantage of), I felt that I had to let her sit on my lap for a few minutes, and I had to put my arm around her and give her a gentle cuddle, and I had to keep on gently moving her hand away from her mouth as she was trying to chew it. I did not want to reject her so I didn't. There were other nurses coming in and out of the (living) room, they frowned, but they didn't say anything.
It broke my heart when I had to leave the residents there in the politics of that home. I did make a complaint to the person at my university who was responsible for arranging and supervising those placements, but I heard no more about it, except a short while later I only scraped a pass mark for my community study - which had had many hours of study, research, cross referencing ect put into it by me, and I usually got high 80's or 90's (out of 100) for all of my previous essays and work, but only 46% for my community study. I think that I was being punished for potentially rocking the boat.
Oh dear, I have really digressed. I am very sorry OP for doing so. I don't know which way to vote, because if Scott Morrison has visited homes like the one where I had a placement, I think he is right to not think that as babies they had been a blessing to themselves or their parents. But if he mainly knows NT and ND people who do, or with the right help can, live happy and fulfilled lives, then in muy opinion the vast majority of both were blessings for their parents, and I can only hope and pray that their parents were blessings for them. If I had to choose, then I think it would have been better if he hadn't made a generalised statement like that, but we are all mearly humans, and as such we frequently make the wrong judgement call.