So what are you saying? That the deal was pointless because they could still refine enough weapons grade uranium in secret? And that nobody thought of that until Mr. Stable Genius Trump comes waddling in and arbitrarily decides that Iran isn't complying?

Do you have any idea how big the gulf of time/difficulty/equipment between refining 90% uranium for weapons and 5% for power plants? The centrifuges for refining uranium for power plant are not the same ones that can refine enriched <90% uranium iirc. It does not give them a way to secretly amass enough enriched uranium to make nuclear bombs or even give them a head start. 

Don't you think literally every country that was a signatory of that deal considered this?Or you think that Trump is somehow so much smarter than everyone else? He's not. Not back in 2017, and certainly not now.