system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can't we dispose of nuclear waste by putting on a subduction tectonic plate to sink it into the earth's core?

I saw the John Oliver segment on nuclear waste, and thought of the following idea: 

Bury the nuclear waste on the subducting side of a subduction boundary of tectonic plates, near the actual boundary. Eventually the tectonic plate, along with the nuclear waste buried in it, would sink under the continental crust where it will melt, become super hot magma, and I assume be diluted in the various super-hot elements down there and gone forever. 

Would this work? Or am I missing something?
gpt
It would work. But the subduction plates move at the same rate that your toenails grow, or thereabouts. So it would take years and years and years for the waste to disappear. Years that highly radioactive/toxic material is sitting on the ocean floor, polluting the water and killing nearby organisms.

Not to mention the difficulty in getting the waste there, which is not a tivial task. It would have to be placed carefully by professionals, as well as transported safely to the location by ship.

It's sort of like saying, "why can't we fire radioactive waste into the sun?" We can. There is no meaningful amount of crap we can shoot into the sun that would make it care. It's just getting it there is enormously expensive and if a rocket explodes in the atmosphere or on the launch pad (which they still do, from time to time), it'd be an enormous mess.