I believe it is because Sportsnet has the rights.
Not sure for how much longer though.
It runs through the 2018-19 academic year.
http://english.cis-sic.ca/sports/cis_news/2013-14/releases/20130508-sportsnet
It would be nice if they were to farm some of the regular season out to Sportsnet 360. However, outside of the AUS, Lakehead and Alberta the games are not well attended for television. In fact, I am not sure how many rinks in Canada West are even useable for TV.
I know both Rutherford in Saskatoon and the Cooperators Centre in Regina are not made for TV. Mount Royal plays at something called the Flames Community Arena, which to mean doesn't sound promising for TV coverage. I suspect this is the same for the majority of CIS rinks.
The thing is outside of the above mentioned places, hockey is not the revenue sport at the majority institutions, football is. When football cannot get regular season games of the week on TV, you won't be able to find anything else either.
The best we could hope for is that each of the conferences negotiate local deals. Canada West and Shaw could partner, the OUA and Rogers and Eastlink and the AUS. I know Rogers and Shaw cover the OHL and WHL respectively, so that may impact their ability to also cover CIS hockey.
Plus, in Shaw's case, I wonder about their availability of production trucks. They would have to arrange the schedule with their WHL coverage. The problem is they like to have a great crowd, as evidenced by their football coverage. So an 85 year old rink in Saskatoon with 666 (seriously that seems to be capacity) people in the rickety rink would not appease Shaw. So unless a good amount of teams were to at least move temporarily into WHL rinks (which still would be a capacity issue in most cities), the optics for TV could be solved. However, 1,200 people in a 15,000 seat arena is the same as 3,000 people in a 30,000 seat football stadium. It is why there are lots of Shaw games from Saskatoon for football.