Hardware schematics and full source code doesn't tell you everything about how a piece of hardware is made either. How was the hardware tested? How was it ca

Hardware schematics and full source code doesn't tell you everything about how a piece of hardware is made either. How was the hardware tested? How was it calibrated? How was it assembled? An ingredients list tells 90% of the story about how food is made, and in most cases an expert could guess the remaining 10% to get a decent result. Likewise, hardware design+code tells 90% and an expert could figure out the remaining 10%. The government could totally require all consumer products have published source code. (published source code != a license for others to use the code)