Even manager doesn't mean much. There are managers (manage people) and manager (managed a business, process, product, etc).

"Management" is manager (business). An engineering manager isn't management, is just a people manager.

Engineering phrases made it to business, and business phrases made it to engineering, that is normal. Berating a profession because you don't understand their lingo is pointless.

And the issue isn't you accusing me of being a manager, but implying that that is bad in some way.