Well - I can't say they have always said this - but at least for Circa 1998 CCNP onwards that's been their position. The instructors were very adamant - to the point that I'm recalling this 27+ years later.
This probably has more to do with network engineers (and CCNP instructors) not being security engineers (or even conversant with Cisco's security SBU).
This probably has more to do with network engineers (and CCNP instructors) not being security engineers (or even conversant with Cisco's security SBU).