If you want to avoid sugar and corn syrup, you'll be paying 3x as much on food. You have to remember to cancel all of those superfluous monthly charges. If you get parking tickets, you're set back. If you don't check your physical mail for too long, you'll discover you accidentally ran a toll road and now they're billing you $150. Whenever you get a phone or internet plan, they never tell you what the final bill is, so you have to remember to add +50% to whatever price they're saying. If you live with someone, you have to get them interested in managing finances too, or else you'll discover you're hemorrhaging money. The list goes on and on.
If you live in the US, it costs ~$400/mo to have health insurance under the ACA. If you can't afford that and go to the ER for any reason, your credit is screwed.