The facts are crossing fingers has nothing to do with reality. What does matter is God has built into humans natural cycles which allow and prevent the conception of life at certain times. We also know that not everyone can or should have children non-stop every nine months. So we have a choice, either use God's own built in cycles for regulating births or we can circumvent God's design all together and use artificial birth control whenever you feel like it.
Do you realize how ridiculous and convoluted your arguments sound?
It's ok to use NFP to prevent pregnancy because the couple has to suffer and "sacrifice" (in other words, go through enough pain) in order to practice it, and that God built into humanity a natural schedule during which time it's ok to practice a form contraception.
What if I had to walk 5 miles (sacrifice and suffering) to the nearest drug store to pick up a pack of condoms and if I could only afford them when I get paid once a month (a schedule). Would that suffice to fulfill my moral obligations?
Yours in Christ
Well, no. I guess I didn't realize how "ridiculous and convoluted [my] arguments sound[ed]." But considering you seem to be missing the point, they must be at the very least confusing.
Having to go up to the store and buy condoms because you ran out is certainly much different than not being able to do anything but abstain from marital relations because your wife's ovulating. I think you could agree with that, right?
Here's why I think the two are different.
1) I could just plan better and would have no need to brave the elements to go to the store.
2) A condom is a man made invention.
3) A condom prevents conception even when a woman is ovulating which is precisely the only time she can get pregnant.
4) When a woman is ovulating is the time she is most likely to desire sexual relations.
5) Waiting because I don't have money or have to walk to the store is entirely within my own hands.
6) Waiting because my wife is ovulating is entirely within God's hands. I can choose not to have relations, but I cannot chose not to get her pregnant.
7) A woman's natural cycle is God's invention.
To summarize my view point...
A) It is not simply the sacrifice that makes NFP ok. It is because the sacrifice is submitting to God's own natural plan. Running out of condoms is certainly not that kind of "sacrifice"--I would argue that it is not sacrificial at all.
B) NFP is not supposed to be used as a form of contraception anyway. It may be used to space births and may be used to avoid pregnancy for grave reasons, but it may not be used simply to have sex without the consequences of conceiving a child for selfish or petty reasons.
I hope that clarifies my arguments some. If not, please let me know and I will try to clarify further. Even if you don't agree with my arguments, I'd still like for you to understand my arguments.