Yup. Can anyone point to even any injuries caused by this kit? Meanwhile, kids were actually killed by lawn darts, and plenty of kids have died on bicycles (though the ultimate fault there typically lies with cars).
And a chemistry set that contains brittle lead ores/alloys that "tend to flake and crumble" is not something I'd want a 12 year old using unsupervised. Nor would I trust the vast majority of adults for that matter...