What prevents COX from adopting a more customer friendly Copy Protection Policy?

Whenever I, or apparently anyone in the forums, brings up the issues customers have with Cox's choice to set all channels not prohibited by the FCC to "Copy Once" the response is some variant of:

The copy protections standards we apply are consistent with the agreements Cox has with various programmers to carry their cable content.  We assure that these comport with the copy protection rules set forth in Section 76.1904(b) of the FCC’s Rules and Regulations as well.

I cannot argue with this statement as all that it says is that Cox has at least as severe DRM as required by service providers, and does not apply more severe DRM than allowed by the FCC.

The FCC rules say in summary that content broadcast over the air cannot have DRM more severe than "Copy Freely" and that only premium (first run) content like PPV and possibly HBO (subsection b.1.ii is where things get fuzzy) can have DRM more severe than "Copy Once"

This means, based on the FCC rules, that in practice most cable channels can be marked "Copy Freely" or "Copy Once".

Given that other cable TV providers, and Cox in some areas, mark almost all content as "Copy Freely". This makes me think that many or most content providers are willing to permit their content to be transmitted as "Copy Freely".

So my question is, given the above, what is preventing Cox from choosing to enforce the least restrictive DRM allowed by the FCC and their agreements with content provider agreements?

As a followup I would also like to know, if the content provider agreements to restrict DRM to "Copy Once" does Cox, as my "friend in the digital age" have a policy of attempting to negotiate for more permissive terms?