I've written on a previous occasion (can't find the link) about why the idea that Iran should be happy to accept becoming reliant on foreign sources for its nuclear power fuel was absurd. Giving other nations power over yours, allowing them to blackmail you into doing whatever they want with the threat of withholding the item on which you are dependent, just isn't a sensible position for a sovereign nation to place itself in.
And now along comes the latest development to reinforce that point. In the last few days (the talking points must have gone out), various pundits on TV are suddenly discussing the fact (which for the purposes of this post I'll accept as true, although I don't actually know that it is) that Iran has a shortage of refining capacity, and that if the U.S. and its allies want to bring Iran to its knees, all they have to do is to put an embargo on selling refined petroleum to Iran. And amazingly enough, not a single one of these learned gentlemen (I use both terms as loosely as possible) who I have heard making this argument have seen any connection between that proposal, and Iran's reluctance to be dependent on foreign sources for nuclear fuel.
For additional reading, here's a previous post describing the reasons why oil-rich Iran might want nuclear power in the first place.