Software Engineering is Engineering though. A B.S. in Software Engineering is an Engineering degree. IT Network Performance Engineer is not an Engineer. You can't get an Engineering degree in that, because it's not Engineering. It's an Engineering discipline, but still different than ME, CE, EE, etc. like you said.
Someone with an IT/CS degree does not even qualify to take the FE/E.I.T. or PE exams, because they are not Engineering degrees.