IMO that's quite misleading. It's true that the amount of radition will dramatically decline. But it does so unevenly, and certain isotopes last much much longe

IMO that's quite misleading. It's true that the amount of radition will dramatically decline. But it does so unevenly, and certain isotopes last much much longer. That's not really a problem if the waste stays contained in one location, but if that waste somehow leaked into water sources or similar then it could have significant consequences. Even a very small amounts of these isotopes can be dangerous if inhaled or ingested.