Seems to me the value proposition for a non-user is that the users the non-user interacts with are better informed through less commercially-biased sources. Something like the herd immunity value of vaccination.
That's a terrible value proposition, especially for someone who finds that CBC is extremely politically slanted in their news coverage. I would say I find regular CBC consumers slightly less informed on average if anything.
Personally, I find CBC the only news that is palatable. They do have a left slant, but that seem consistent with the average citizens position when compared to the USA and the news/media we get from them.
The stories are different too, which might come from an incentive to provide a public service rather than a sensationalization of what is happen as a profit motive.
Both Global and CTV's I find tends to do a decent job covering both sides. CBC's leans pretty strongly to the left. We don't have a lot of strongly right leaning TV outlets in Canada, but I wouldn't encourage paying publically for the Sun or National Post either.
Global is rather conservative biased. I do find CTV to do pretty reasonably, and have some decent talent, but still I'd rather have a publicly funded organization that doesn't have to worry about ratings.