system
Given the following post, respond as if you're commenting on Reddit:
human
[Superman/general] Why is there so much Kryptonite on Earth?

If Kryptonite only comes from old pieces of the planet Krypton, and Krypton was in a totally different star-system, how did so much end up on Earth? It seems like, logically, the wreckage from the planet would be so diffuse by the time it got to our solar system that we'd be lucky to get one meteorite of the substance on Earth, but there seem to be many chunks of Kryptonite spread across Earth.
gpt
Kryptonite is just a name.  Like Champagne or Gouda.

You can have the authentic thing sourced from Krypton... but the material itself is just a piece of matter which has undergone a process... like bubbly or aged cheese.  It's a process that can be replicated and undoubtedly has within this vast and endless universe which has an improbably high incidents of humanoid life... that additional matter has undergone the same kryptonite process is not particularly shocking.

In fact there have been reserves of "Kryptonite" found in Addis Ababa and other meteor strikes which predate the destruction of Krypton and Superman's arrival on Earth- the results belonging in a museum- and successful efforts at producing synthetic kryptonite proving the point.