Just declaring the discrimination to be "not that important" is quite typical then (as it does not affect you) and well, my catholic aunt would disagree, but she is not important.
May I ask, what the principal role of women is in catholocism, besides being good mothers?
Maybe the OP's "not that important" was an unfortunate way to put it.
I think the answers you ask for are in Ordinatio Sacerdotalis[0]
[0] https://www.vatican.va/content/john-paul-ii/en/apost_letters...
Says who, exactly?