Depends on the machinist or carpenter. I sold cabinetry for 2-1/2 years. I NEVER saw a carpenter's square at any job site. Construction showed it! A professional chef can cut accurately by practice.
Sometimes they can come together very nicely. Hardwood Smokers, Kamado and BBQ grills, and brick Pizza Ovens. Mmmmm Making me hungry. Apple, Cherry, Hickory, Mesquite, Oak, mmmmmm. - Dave