Discussion: What's your most controversial supply chain opinion?

Like the title says, there are some things that people in supply chain or their sub-depts believe or swear by that is just totally not true. What do you got?

I'll go first: Inventory Management is a part of supply chain management! I feel like this is a no-brainer and shouldn't be controversial, yet it's not widely accepted. As someone who went to school for supply chain, inventory management is a core concept in it. We took classes on things like forecasting methods, and EOQs, etc. Everything we learned about supply chain includes the inventory and how it's managed including shipped, manufactured, sold, destroyed, etc.

Then I get out into the real world and get a job in inventory management for a big Fortune 500 retailer, and they act like Supply Chain is a totally different thing with lean six sigma stuff. They described me coming into Inventory Management like I was making a career pivot. They report into different SVPs - with no overlap. The two teams don't even work that closely together. We also had a seperate warehouse and logistics team - which we did work with. But this idea that inventory management is different from supply chain management and not a tiny chunk of SCM is very pervasive at companies and widely accepted - even at other retailers I've worked for.