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I'd suggest generalizing this question, which ultimately seems to boil down to, "If the Pope were to issue decrees contrary to dogma, are the faithful required by that dogma to leave the Church?"
... in other words, even at a "literal" read, you can't pick words out of a phrase and expect them to be independently meaningful. Even a "literal" read must interpret each word in context -- of the sentence in particular, but also of the larger work.
Voting to close: This question is going to be primarily opinion-based. Theologians have been wrestling with the role of evil for 5k+ years. Christian theologians since the death of Christ. A singular, doctrinal, or universally accepted explanation has yet to arise ...
That said... The Church isn't in the business of making scientific theories doctrinal. It's business is in presenting a proper, applicable understanding of that which has been revealed through Christ. The Pope's statement is binding inasmuch as the Catholic isn't permitted to think these theories (or whatever you call them) contradict Catholic teaching.
@MattGutting I'll have to give that encyclical a read-through then! ... I'd thought the Church took a more "hands off" approach to whether women could be priests, to the point of suggesting they actually "could"; only that the Church didn't have any authority to make such a conclusion.
