"Don't worry... it passed safety studies."
Yes... but... we now allow toxins and even carcinogens, under the idea that the studied product on its own "doesn't contribute much effect."
So what about endless numbers of toxins being introduced "a little" at a time.
You can get to a million by one chunk of one million, or you can get to a million by advancing ten at a time. Either way, you've got a million.  But our way of doing things says "don't worry - it's just ten."