As someone who was a mechanic, and later became an engineer, this is the main reason why I find Rossman's videos insufferable. He is constantly making assumptions about how electronics are designed based on his views as a repair man. As a mechanic I made the same assumptions, but I was later able to learn that every decision an engineer makes is one of compromise, based on hundreds of variables that the mechanic does not know about because of the narrow view that any technician has concerning the product that they are servicing: observing the hard shell of an egg and assuming that the contents must be equally hard.