But, you can accurately quantify the risks of coal using current facts, because the direct effects of coal power are measurable. When you stop using coal, the effects start to go away.
Even with rooftop solar, you can measure the risks of maintenance personnel falling off of roofs and production accidents. Again, current risks that can be measured and evaluated. If you take the panel off of your roof, there is zero risk of someone dying as a result of your panel. In the year 2200, I can say conclusively that no human will be injured as a result of the solar panel on my roof.
Nuclear is different, because while the operating lifetime of the plant is dozens of years, it leaves behind waste products which introduce life-threatening risks for hundreds or thousands of years. Nobody on earth has a viable long-term strategy for managing waste products today, nor an ETA for when that strategy will be devised and implemented.
That doesn't mean that nuclear energy is evil or otherwise morally reprehensible -- it is not. But ignoring obvious long term risks by narrowing the scope of what you consider a risk to be is not an apples to apples comparison.