It depends. Is it wrong to abort a child with mild autism? (Assuming we could test for that)

I’d say very much so. (assuming the child was otherwise wanted)

But if it’s a disability where they (or people around them) were to live a life full of (mental) pain it would be a different story.

So there is a line somewhere. But drawing a line between “desirables” and “undesirables” is frowned upon.