[showerthoughtsofficial]:
When medication says "do not operate heavy machinery" they're probably mainly referring to cars, but my mind always goes to forklift.
[sauntervaguelydownward]:
It has honestly never occured to me that this warning was about cars and not construction equipment
Which is specifically why for-profit pharmaceuticals use the vague language. They want to make sure they can't be sued when someone falls asleep at the wheel after taking their medicine so they point to the warning and say "not our problem, they were warned and did it anyway."
But if they specified "do not drive," then people would look for the medicine that didn't say "do not drive," and use that instead.