Easy for you to say, but in 300,000 years some mentally defective person might dig up the waste and eat it. Are you prepared to run that risk?
Oops, ignore the electoral college.
That's actually a positive about nuclear energy. Humans have destroyed so many species on Earth, but now we will be creating new species through genetic mutation to replace them. Or at least, that's what Fox Mulder mused at the end of an old X-Files episode.