I agree, but I do think some people use NFP in a way that negates some of its positive non-contraceptive aspects. The sacrifice that comes with abstinence can certainly motivate a couple to re-evaluate their reasons for avoiding pregnancy.
However, I recall posters advising those practicing NFP to do just that, periodically re-evaluate if their reasons for avoiding are truly “just”. And then being pilloried and told essentially “how dare you presume to judge other couples” and even accused of being anti-NFP.

So, it seems many who practice NFP don’t think such a re-evaluation is actually required, but that it’s fine to take the attitude that “We decided after Kid #4 that there was no way we could ever parent another child, end of story.”.
ETA: I must admit that kind of attitude does strike me as not that different from many with the same attitude who use ABC. Many of whom find abortion morally repugnant, and would be happy to welcome a child into the world if the ABC method doesn’t work – and I know of “pill babies” and even a “IUD baby”. Is that really so different than the “Absolutely done with actively trying for more kids, but if God surprises us we’ll welcome another” attitude many NFP users seem to have?