Iran wants investors, investors want in. Pent-up demand meets the amorality of the profit motive.
IAEA (know who they are!) responds to conservative criticism of the deal:
Imagine the points Corker makes as tag lines in a CX Aff case, and Pincus’ reply as the Neg rebuttal:
Note the points Pincus makes on Iran’s actual standing in the area; he’s not the only one to point this out: