How will becoming a nuclear power help Iran with ”acceptance of its reintegration into the banking and finance system of the world”?
There are already two known nuclear powers, Russia and North Korea, which are both under heavy sanctions and practically decoupled from the financial system. If Iran becomes a nuclear power, they can say goodbye to any hope of reintegration into the global financial system.
Iran, unlike North Korea and also Russia since the Minsk accords were trashed, has been in constant negotiations with the Western powers from the time of Khatami in the late 90s when they bricked their centrifuges willingly as they thought correctly they are prime target post-9/11 (not to mention Iran Contra affair). As per here (
https://en.wikipedia.org/wiki/Mossad_infiltration_of_Iranian_nuclear_archive), Iran was quite close to a bomb and they gave it willingly at the time to avoid a U.S. invasion.
Afterwards they were instrumental in both overthrowing Saddam and the Taliban governments, and collaborated with coalition forces massively. Since then they have also been in constant negotiations, e.g. during Ahmadinejad, who took a more hardline stance after Khatami's compromise didn't bring the promised fruits. His hardline stance (President's of Iran can only adopt a position after tacit approval by the Supreme leader, so in that sense the stance is always his), 2009 sanctions ensued which forced Iran's hands into the negotiating table; these negotiations resulted in a deal during Rouhani's reign called the JCPOA (colloquially, the Iran deal). After Trump left the deal, the European members of 5+1 were very keen on strengthening business ties with Iran in defiance of Trump's unilateral move. Since then, during Biden and Raisi era there has also been constant negotiations, as Iran demanded U.S. return to the deal, and U.S. demanding Iran prove they're abiding by the deal first in order for them to come back. Ensuing these talks, IAEI probes got underway and until Iran's involvement in Ukraine-Russia war made U.S. sour on the deal, a compromise was almost at hand.
Furthermore, Iran, unlike Russia, is in the FATF blacklist, so the reintegration alluded to is partly something Russia already has. Many people in our country comically talk about Turkey being sanctioned by Western countries, but they have no clue what sanctions look like. Iran is barely surviving by selling the free money it has in the shape of oil and gas to China with like 30% discount and through barter with China and through them with certain African and Latin American countries as they cannot use SWIFT either.
So yeah to reiterate, Iran is willing to negotiate and compromise and the sanctions on them are much more severe than Russia despite what numbers might indicate. Because of this, the deterrence of nuclear bombs and the lifting of the spectre of regime change, will strengthen their hands in negotiations massively.