Replace "Microsoft" with manufacturers of food, cars, medicines, personal hygiene products, etc. They are regulated, inspected, but all under the same / similar

Replace "Microsoft" with manufacturers of food, cars, medicines, personal hygiene products, etc. They are regulated, inspected, but all under the same / similar conditions: > or access granted to outsiders covering very limited portions of source code under strict agreements that limit sharing that information You are trusting the manufacturer's promises. Are they essentially meaningless just because the general public doesn't have insight into manufacturing details?