Well, we need to solve that problem. Because nuclear power is a watermark for how well a civilization can handle complexity. It's good practice for the next pandemic, or solar flare, or civil unrest. If we can't handle nuclear, we should just throw in the towel and go back to warring tribes.
And once the world is covered in non-operational solar panels and wind turbines, you think we'll be able to fix it? You think a massive worldwide recycling campaign is going to be easier than nuclear?