The arguments around this are always weak and spurious. I've been at this too long to take the bait from any trolls who 'have it all figured out.'
By no measure or justification is splitting the atom a good idea. There are few things more short sighted than arguing we should figure out what to do with nuclear waste because we haven't quite nailed solutions with ZERO waste.
People who minimize the significance of both nuclear waste and absolutely inevitable nuclear disasters just aren't thinking with any foresight or vision about the core concepts of sustainability.
But then that's it. A lot of people advancing Nuclear power aren't environmentalists at all. Learned that the hard way.
No nukes!