You do realize that there are ways to avoid nuclear proliferation without war? The US had a deal with Iran and multiple other countries that made them limit their nuclear capabilities, but the US withdrew from it in 2018.
Iran needing to be babysat is their choice. Numerous states are capable of building nuclear weapons or enriching weapon-grade uranium. And they don't, because they aren't bad actors.
Iran is an objectively bad actor when it comes to nuclear weapons. They created the problem voluntarily, of their own volition. What comes after is not up to them.
Iran, by the way, broke the IAEA agreement. Fordo was built illegally, without disclosure to the IAEA.
