Do you know of any electrical device that was designed with out doing the circuit analysis, just spatially slapped the parts together? Do you know of any build

Do you know of any electrical device that was designed with out doing the circuit analysis, just spatially slapped the parts together? Do you know of any buildings taller than a story that were built spatially without doing any analysis of load? When was the last time you heard of a car that was put together by someone who didn't do the math to make sure the engine wouldn't explode at speed? Try building an artificial hart without doing the flow analysis. Being good at math isn't a sufficient condition to be a great engineer but it is a necessary condition.