I deliberately gave the examples in the order I thought would be most persuasive to least. For at least one of them (I hope!) you would likely admit while there is risk (or at very least that safety hasn’t been definitively established, whatever that might mean), that you are willing to ignore it and move on with your life. For the ones you don’t agree with, you are making some sort of personal moral and scientific judgment, perhaps weighing factors such as what do we know and what can we know, who faces the risk and who enjoys the benefits, and how would this calculation change if the ingredient/process was replaced? In any case the poorly defined standard of “absolute safety” isn’t a practically useful one.