That’s false. In France we have a project to bury them 500m underground in stable geological formations. And even if this site failed to retain the radioactive (which studies says it will not) that would be a minor issue against climate change.

As for security issues since nuclear power exists (~70 years) we can count deadly accidents in some dozens of victims while the pollution due to burning fuels kills several thousands of people every year.

At this point it’s so ridiculous that you have way more chance to die in a plane crash of anything nuclear.

Also contrary to a belief, a plane crashing in a nuclear powerplant, while creating a certain horrible mess would not be really different than crashing it in any petrochemical plant. For comparison that would be way less dramatic than the AZF of Beyrouth explosions.