agree with your statements about the "open to life" arguement, that should always be the considereation and yes, God can do all....that is the main thing when considering NFP, if your planning fails, but was done with good and rightous intentions, then open to life is a yes....emphasis on good intentions and open to life...
Otherwise, this topic bores the heck out of me,,,,yes it is important, but not my hot button, as it is for Raoul and others...
but, if it were me and due to grave reasons I was practicing NFP-again, grave reasonss not "I want a beach house and kid would mess that up" thinking and the wife got preegnant, then though I may not have wanted the pregnancy to happen, it would be a gift of God to accept and praise him for....our words shouldbe in this and every other time "thine will Lord, not mine"...
so, NFP for grave reasons only..if it fails, aceptance and fiat of His will...as did Mary say "thy will, not mine".....