And that too is an excellent point. Just because source material is safe for a specific purpose, doesn't mean it always remains so unless the entire process and the product it becomes is also designed properly. 3D printing leaves microscopic (and frequently much larger) pits and spaces. Injection molding doesn't usually. Same source material, different manufacturing technique both yield completely different levels of food safety.

As a business, yes, there are whole different risks involved. From a personal standpoint, not nearly so since we control the situation. As a business, what the customer dose with what we sell them is beyond our control but the business ends up being responsible anyway. I give you the paint industry. Paint is not a food product. They got sued many times over because people ate paint chips. The product was used in a way in which it was not designed and they were still blamed. I give you McDonalds. They make coffee. Nobody considers hot coffee a crotch ointment. It says "HOT" on it. They still got sued because someone poured coffee in their crotch. Sue happy BS. Take responsibility for being stupid people.

And you are correct as well, the filament is food safe in that it imparts no chemicals into it at any time (ie BPA but there are other hazards). The printed item may not be food safe because it fails the bacteriological aspect because of the way its manufactured, not what it was manufactured from.