It's almost amusing that everybody says that the objective of the talks on Iran's nuclear program leaves an end state of Iran with no nuclear weapons (Iran simply denies wanting or trying to get them). But that isn't how it will work out.
You've heard the expression, "don't let the pursuit of the perfect be the enemy of good."
In regard to the Obama administration's negotiations with Iran, the Obama administration's saying is "don't let pursuit of the perfect be the enemy of the bad."