I stand to be corrected on this, but I don't think that was the issue in the case. That would be like saying it's OK for manufacturers of industrial equipment to delete all safety guards because only a DMF would put his hand where it will get chopped off, crushed, etc. McDonalds knew that its customers were human beings. Human beings, except mikemover, do dumb things. If McDonalds had some good reason for their coffee to be so extremely hot, then perhaps they could have justified injuring people who foolishly spill coffee on themselves.

Substituting your judgment of the case for the judgment of the people who actually heard the evidence doesn't seem smart to me.