in what other contexts do we tell people: the studies don't show harmful effects at low levels, but you shouldn't do it anyway because the studies haven't proven there aren't harmful effects at low levels?
In contexts where the effects aren't suffered by the person making the choice, but by someone else that's at their mercy--in this case, the child. Making decisions about one's own risk is very different from making decisions about someone else's; the latter involves a much greater responsibility to avoid possible harm.
In contexts where the effects aren't suffered by the person making the choice, but by someone else that's at their mercy--in this case, the child. Making decisions about one's own risk is very different from making decisions about someone else's; the latter involves a much greater responsibility to avoid possible harm.