Kurt Ullman wrote:

If the question is can someone go to the local Ox-shop, tell the
person they want welding oxygen, take it home and use it for
medical, yeah. Just like you can use medications for off-label
uses, but you take on extra risks by doing that.

Is it really the case that you are taking on extra risk?

Or is it more the case that you can seek financial compensation if you
purchase the medical-labelled product, because the extra cost you
shelled out for was essentially an insurance policy - not a garantee or
a certainty of getting a better product. ?