I mean, fucking up is a common thing people do and is an integral part of the human condition. What should be emphasized about Jobs case is that he fucked up his own liver, learned the cause and treatments, used his wealth to cut in the waiting line to get a liver transplant, and then fucked his second liver just the same way. This is the definition of terminally stupid, and no UX focus will ever change that.
Iirc, what we normally call “sugar” is sucrose, made up of glucose and fructose. Glucose is used all over the place and too much is definitely bad (ask diabetics), while fructose is processed in your liver. Like a poison.
Just trying to remember that from stuff I’ve seen from Robert Lustig MD. There’s a very old “sugar: the bitter truth” lecture of his on YouTube, plus lots of media since then.