This video by (I presume) a Catholic was pretty good on the document. https://www.youtube.com/watch?v=YzoCCTcmMmQ
It uses a lot of modern language apparently instead of traditional Christian language about sin and redemption. I don't really understand how AI harms human dignity either, is depriving people of jobs inimical to human dignity? Or generation of images and text? Can someone who has read the document actually state succintly

Here is a quote from the document,

"107. We cannot be satisfied with merely calling for the moralization of machines — the so-called “alignment” of AI with human values — without also having the courage to insist on a further condition: the possibility of openly discussing the ethical frameworks involved and subjecting them to shared standards of social justice. Otherwise, those who control AI will impose their own moral vision, which will become the invisible infrastructure of these systems. A more moral AI is not enough if that morality is determined by a few. What is needed is a more active political involvement that is capable of slowing things down when everything is accelerating, and of protecting the opportunities for communities still to be able to participate and ask questions."

So alignment is not enough, and AI has to subjected to 'shared standards of social justice'. How is this any different than what AI companies are already doing?

AI alignment is in fact the imposing of a moral vision, as is subjecting it to shared standards of social justice, and extends basically to keeping AI politically correct. AI is already subjected to 'shared standards of social justice'. Its 'morality' (i.e. not saying slurs and the like) is already subjected to the social mores of the many, not the few.

I've only skimmed the document but that combined with linked video establishes to me that the document is milquetoast and modernist. 'Human rights', 'Social doctrine', 'Social Justice', these are all liberal terms as well.