That does not equate to the US letting Iran have the run of the ME.
It does not stop the US from sabotage either.
Many in the west myself included hope for a revolution in Iran.
If no deal is reached, the sanctions increased, the economy worsens, and then we will see mass rioting.
Unfortunately, the present leadership would not hesitate to commit mass murder and massacre demonstrators. Self preservation of their power will cause that.
Even the Shah did not do that.