Well if you want to make these sorts of comparisons why not ban cars (cause lots of death, including children) and firearms (accidental shootings alone probably

Well if you want to make these sorts of comparisons why not ban cars (cause lots of death, including children) and firearms (accidental shootings alone probably make magnets look like...well toys). If you ban stuff at some point someone has to at least implicitly weight utility against risk. That's ultimately going to be fairly subjective. I'd say cars are overall still a good thing, guns I'm not sure about (but in the U.S. the constitution trumps the death statistics), magnets...I have a hard time quantifying the utility but there's probably a decent economic argument for them overall. It's obviously easy to say "protection of innocent children" but that doesn't mean it's all there is to it.