I don't know what it's like in the US, but here in the UK the reasoning is very clear, and contrasts with medicine. With medicine, products that can't be prove

I don't know what it's like in the US, but here in the UK the reasoning is very clear, and contrasts with medicine. With medicine, products that can't be proven safe (to x degree) are banned. With food, products the are proven dangerous (to x degree) are banned. So with one, the default is "it's not ok", and with the other, it's "it is ok".