Why is the US idea of ​​removing uranium from Iran so risky?

Senior administration officials said early in the war that the United States might consider diluting Iran’s highly enriched uranium on site rather than removing it from the country. But that would be a large, complex and time-consuming operation, said Jonathan Ruhe, an expert on Iran’s nuclear program at the Jewish Institute for National Security of America, a think tank (conservative research and debate center) in Washington DC, USA.