Existing tools speak the wrong language to the wrong person.
QuickBooks, Xero, FreshBooks — they all assume you understand chart-of-accounts, you can interpret a P&L statement, and that filing your VAT return is a routine task. For a freelance designer or a two-person studio, none of that is true.
So makers either pay an accountant they don't fully trust, or they keep everything in a spreadsheet and panic at year-end. Neither is good.