With respect to impedance, a network cable may indeed not be the best option in this application; but a network cable with impedance _adjustments_ in order to match/mate with the target component's (phono) impedance is perhaps fine - and MIT are the only ones who do that (essentially reflect the target component's input impedance).
The thing is, the articulation technology works so well sound-wise plus apparently lowers noise so dramatically (also evident on line-level interconnects and speaker cables), that you cannot dismiss it in this position. Having said that, at the end of the day, there is no free lunch with anything: the articulation networks will affect impedance on their own, and the impedance adjustment will try to compensate for that, with the goal being that the phono loading impedance is overall [hopefully] unchanged. This is pretty tricky stuff.
What I would call just the wrong thing to do is use other so-called networked phono cables that "match" cartridge and phono stage - a fundamentally flawed approach, simply because users adjust loading impedance on the phono stage, thus breaking any "matching" done by the cable designer. I simply call these types of cables tone controls, as they solve no engineering problem between cartridge and phono whatsoever (and none exist, other than what MIT does and no one else can, but even then those problems relate to the wire itself, not the cart and phono), nor do they at line level either between two already matched components, from the same manufacturer or not.
