There's no evidence the fatwa even exists (aside from statements by self-interested parties), much less any details of its contents and any exception it may have. At any point they could point to an exception in subsection 4) c) and do whatever they want. Because the fatwa isn't published, they can add whatever exception they want later. If it really exists and is really meaningful, they would have publicized it in advance and so been bound by it.
I believe the right to "do whatever they want" is one generally valued by sovereign entities. The ability to "do whatever they want" is probably not really a good reason to bomb them. It does sound like a good reason to not capriciously discard the JCPOA, which is an agreement they adhered to restricting their enrichment of uranium that was discarded to no positive end by Donald Trump, the man who is illegally starting another US war of choice as we speak.
Would we have bombed them if they'd secretly been violating the JCPOA and developed nuclear weapons in 2017? It's worked for literally everyone else who's tried it and it is hard to empathize with a perspective in which the United States has true moral authority over a country that we destabilized and have continuously demonized.
Then it is very obviously a moral imperative for the leadership of Iran to have the ability to rapidly develop a nuclear weapon in order to protect its sovereignty, a concept you deny Iran, and its many people.
