In short,
It does not matter what happens at the October Synod.
Even if Francis becomes an unquestioned apostate by trying to "redefine" the Natural Law, the natural law will still be true. 2+2 will still be equal to 4 come this November and even the one after, even if Francis tries to make it out to be 4.1, 5, 10, or whatever...
I agree with the last part of your quote. But it does matter in some regards. It will matter in the sense that conciliarism, and I believe that there are still some true Catholic souls there out of what they think is obligatory obedience, will be caught up in this further downward spiral of the "church," and their souls will be in yet greater peril than now by following this evil.
I agree that it does not matter in terms of changing the truth--you're right--2+2 will still equal 4. But I do believe it will matter in terms of consequences. Hopefully rather than riding the swirl of the bath water down the drain, it will open the eyes of true Catholics stranded in conciliardom and they will find their way to true Catholicism.
And, of course, I agree 100% with everything that you said. In terms of Ultimate Truth, it does not matter what some heretic Bishop and/or even "Pope" says, but in terms of
consequences, especially, eternal, then such does, in fact, matter. Point is that no one ought to lose his/her Catholic faith (as was said in another post, "some will walk-away from the Church this October") just because Francis decides to become a formal apostate. Just because he loses (or, has lost) his faith is
no excuse for you to lose yours!