IIRC the narrative and the headline was “duh ! Hot coffee is hot! Idiot! “. ……But it turned out something like, McD coffee was like 99 degrees versus 70 degrees for your average cup and it was decided that makes a difference.
You’d have to check that, but that’s what I remember .
IMHO you still handle a hot drink like it could scald you , that’s your responsibility and your taught that from like 5 years old . However, you wouldn’t expect to be handed pretty much boiling water in a plastic cup .