Yes abortion as a choice should always exist. Just like the case where a woman had a "late" termination for baby with cleft palate, yep her choice.
The discussion (not judgement) is what else should we be/will we be actively screening for so that termination becomes the presumed likely choice? Standard recommendation for Turners Syndrome is also termination.
What if becomes likeliness to develop childhood Type 2 diabetes - the health risks, the impact on quality of life.
As with many syndromes, illnesses and dystrophies - they have each often have a wide range of effects, some people are affecting mildly, some very severely. We will never have a crystal ball to see what the future really holds.
In the future shall we increase screening at a later point in pregnancy when more things are identifiable and then give termination as the recommendation (I'm not talking about it not being an option, but about it being the automatic recommendation) - 30, 35 weeks???