In other words, radioactive waste isn't a "your children" problem, it's several generations removed if a solution hasn't been found by then. Climate change is indeed a "your children" problem, if you're old enough to die in the next couple of decades. Otherwise it's a You problem.
You simply can't compare a worldwide, global, catastrophic change in climate, causing millions to die, species to go instinct, and trillions of dollars in damages to... this. What exactly is your reasoning in making them equal?
If you're talking about storing the waste long-term, on the order of "more than any country existed on the planet", then this is a problem only because the irrational fear of nuclear doesn't let us build reactors that could further reprocess the fuel.
(And if civilization collapsed now, then all you have to do is to burn the paper maps on which the storage location is marked, and nobody will find the waste before it decays to background radiation levels. If we fuck up civilization now, then the few remaining survivors will be stuck for a couple thousand years with medieval-era technology on a thoroughly broken planet. It's extremely unlikely someone would stumble upon the ruins radioactive waste storage plant. The planet is very large, the amount of nuclear waste is ridiculously tiny.)
in 100 years we will see if it was a good idea. and basically thats the problem of waste disposal.
https://www.scientificamerican.com/article/coal-ash-is-more-...