G’morning! Yes, it is true, that even if it had been the case of a change of text, ‘men’ would still have meant ‘mankind’.
Nevertheless, as you said, the sinlessness of Our Lady is rooted in Scripture but takes prayerful study to discover it. Also, the Holy Spirit, when discerned, can be reasoned from Scripture. As you also said, the reason people don’t discover these things is because they fail to read Bible texts as a consistent whole along with other texts, and so fail to see the bigger picture. If these truths could not have been found in Scripture or reasoned from Scripture then the Church would not have supported them, as countless holy men and women would not have pronounced them, which they have. And they would not make sense, which they obviously do. **Neither faith nor reason would lead us to them, which both faith and reason do. **So I think we’re on the same page.
I might write the words to the Litany as there must be references in there.
I know what you meant by ‘sin nature’, it is just that I don’t know whether the term helps. Which is why I’ve been pondering on it. I’m thinking of The Fall and everything. I love the Genesis stories and think they explain many things so was just trying to reason in my head the relationship between one’s soul and the rest of nature as to that specific term - not to worry (for now

).

Thanks.