Would it be fair to say that it's not a problem that has really been solved because it's a relatively small and non urgent problem? The spent fuel isn't danger

Would it be fair to say that it's not a problem that has really been solved because it's a relatively small and non urgent problem? The spent fuel isn't dangerous while it just sits there, and there isn't that much of it. My understanding is that most spent fuel just gets stored on site, because it's the easiest way. I guess my point is that having to deal with storing solid, static nuclear fuel seems like a pretty good problem to have, compared to having to somehow capture the billions of tons of CO2 that we've put into the atmosphere from burning fossil fuels for power. And I'm not sure about the relative environmental impact, but it's important to note that this thorium and uranium mining would be competing with coal mining.