I am convinced at least some of it is there to confuse the engineers who would try to understand the system. For example, I tell people who want to learn netwo

I am convinced at least some of it is there to confuse the engineers who would try to understand the system. For example, I tell people who want to learn networking "do NOT start with the OSI model. Start by learning how TCP/IP actually works and how it was designed. Then learn how and why the OSI model was designed." But a lot of people insist on going the other way, I think because it is more confusing and obfuscates more than it clarifies.