there are many reasons to do nuclear research beyond medicine, for batteries like the ones powering the voyager space craft, nuclear reactors come in a wide variety of configurations, and many of them actualy produce more radioactive elements that then need to be managed. 60% is nothing,80% is nothing, it needs to be 93%++, and LOTS of it to build a bomb, and given the number of bombs already arrayed around Iran, they would need 100's and all the infrastructure to become a credible threat , for which they plainly dont have the money to afford. The wildly unpopular leaders going after Iran need a scapegoat, or rather a continious supply of scapegoats, but have failed to recognise that the world is moving past them.