I don’t think anyone is being dismissive they are just being realistic.
As has been said, DS is such a huge spectrum and there is absolutely no way of knowing if the infant will be severely affected with life long problems (inclusive or medical and/or learning needs) and if they will require 24/7 care, or whether they infant will be mildly affected and will be able to lead a relatively normal life. Continuing with the pregnancy is a gamble and if the mother/family doesn’t feel like they have the reserves or the resources to take the risk of having a severely affected infant then it makes sense not to continue with the pregnancy.
For some people the risk of having a severely affected infant is one they are prepared to take and for other people, it isn’t.
I have seen the arguments of there is no way of knowing what may happen to a healthy child in the future, for example they may get a severe illness or be in an accident and need long-term care and so there is no guarantee of anything, and whilst I agree with this, the only difference is that situations like that can’t be screened for whereas DS can.
Making an informed decision isn’t just about hearing the positive anecdotal stories or reading about people who are mildly affected with DS and who have had happy ‘normal’ lives within happy families, it’s also about being informed about the opposite end of the spectrum too where sadly there will be very challenging and distressing situations and experiences I imagine.
Yes, having a child with DS may be “no big deal” to a lot of people but to a lot of others it is a big deal and not a gamble they want to take in terms of what the diagnosis may mean for their child itself but also for the future of the family and the impact a severely affected infant may have.
OP’s stance may be offensive to some, who I imagine would be individuals who have positive stories about lovely DS children they know, but those cases do not make the potential negative aspects of having an infant who is severely affected with DS disappear.
OP and all the other women who would, or who have terminated for DS are making the right decision for themselves and they don’t deserve any kind of judgement.