"Poisons" is subjective. Practially all the stable bi-products are naturally occuring in nature and many of them have all sorts of uses [1] [2]. The chemical toxicity of spent nuclear fuel (excluding radioactivity issues) is not worse than many other industrial processes in general. Spent nuclear fuel definitely needs to be treated/handled carefully, but what you say is not a "nuclear" problem - rather it is a 21 century high-tech, industrialized society problem in general.
That's more or less my point. Nuclear waste is similar to other toxic waste in terms of the danger and long-term storage problems. Yet with one we just say "Let's be real careful about how we dispose of this" while with the other we say, "We cannot proceed with any more of this activity until we come up with an absolutely foolproof disposal method that will last longer than civilization itself."
[1] https://en.wikipedia.org/wiki/Krypton
[2] https://en.wikipedia.org/wiki/Zirconium