Whenever someone is about to show you the dirty secrets behind an industry, they often describe it as showing you "how the sausage is made."
After all, a lot of people love hot dogs and other types of sausage but that doesn't make the process that goes into making them any less disgusting. Even if you can get past the fact that they consist of animal parts we otherwise wouldn't eat, it involves a lot of sights and smells that feel impolite to even describe.