While I empathize with your position, since it emphasizes personal responsibility, I cannot entirely agree:
We are fallen beings. I Corinthians 10:12 cautions against assuming one can stand against any temptation. No one is infallibly immune to such.
(And, no, I do not write from personal experience, that is, in failing to be faithful in marriage.)
P.S.
Although it is not commonly understood anymore, “Till Death Do Us Part” [”Till Death Us Do Part”] is a bastardized phrase, distorted by time and culture, rendering it seemingly incorrect grammatically. The original statement is, Till Death Us Depart, meaning, till death depart - or separate - us. The proof of this is that “us” is the objective case; it is the object of the action being committed by Death. If it were meant to be the subjective case, then the original phrase would have been, Till Death We Depart.
I *completely* agree that “no one is infallibly immune”. But I know a hell of a lot of people who put themselves in temptation’s way and then try to play that card. First rule of staying faithful (be it to spouse or diet) is to not put yourself in the vicinity of temptation in the first place. If you just make sure you aren’t where you aren’t supposed to be, doing what you aren’t supposed to do, your chances of doing something that you will regret forever fall drastically .