I have 3 disabled dc.
Dd1 is never going to live independently. What type,of care she will need is still in question, but she will need care. Forever.
I had dd2 knowing that dd1 was not developing typically. Full knowledge that she was not 'normal', but no knowledge to what extent she would be affected.
Dd2 is also disabled, it not to the same extent that dd1 is.
I still had a third child.
He too is disabled. Again, not to the extent dd1 is, but he is still affected.
Selfish? Yes, probably, but that could be said of anyone who has more than one child, whatever their situation.
All my children are happy to be here, and have (within their limitations) a good life. Their lives all have equal value, despite their potential futures being so very different.
I don't know what the future holds for dd1. She is only 12, and it is impossible to predict.
Equally, I don't actually know what the future holds for dd2 or ds. We all like to think we know our dc's future is secure and predictable, but we don't. Right now, I could tell you that dd2 (10) will grow up, be reasonably successful academically, go to university, and have a pick of careers. She is certainly capable of that, but I don't actually know that she won't drop out (at any point) due to a whole range of potential problems; or that she won't (as I did) 'waste' her potential by settling down and having children (obviously my plan wasn't to be a sahm forever, but ummm, life intervened
and the situation is what it is) and possibly her situation then may dictate what happens next; or maybe she'll just run away and joins the circus. Who the fuck knows?
Her life, with its different possibilities, isn't worth any more than dd1's life, which has less potential outcomes (no career, no children unless something goes horribly wrong). It's just different.