My mom was an accountant and she looked flabbergasted when I told her her $2k/month timeshare was costing her $24k/year, sucking up almost all of her social security.
I'm not at all disparaging accountants here but I don't see any reason why they would have superior budgeting capabilities. Accountants are generally in charge of recording the accounts and not actually setting and spending the budget no?
The person I would be shocked to be bad at this would be someone like the owner of a boring and non-expanding local business, like a tire repair shop.