Well, the government does have to try and please everyone equally. So if they want to fund the arts, fine. And I can also live with them funding amateur stuff more than professional stuff.
But at the same time, I'd say sports are much more popular than the arts. I'm sure that over a year, local sports features much more paid attendance than most, if not all local arts-related things combined (in those cities with a CFL or NHL team, anyway). Still, arts seems to get much more funding.
I'd guess the government wants to support Canadian culture, but Canadian sports ARE Canadian culture, and an essential part of it to boot. Especially something like Canadian football, which is really only played in one country in the world.
Hell, maybe if you convinced the government that a CFL team would liven up the maritimes, and that it would boost the economy and reputation/recognition of the maritimes, maybe that would help. (Not to mention creating jobs and travel ... which I guess is economy ... nm.)
But of course people will whine about it ... and since (unfortunately) the group of hardcore CFL fans is likely smaller than the group of people who would rather see money put towards education, health care, etc, we'd likely lose out.
The other thing is that the artists tend to be louder ... both in voice and money (paying patrons tend to be the well-to-do).
I would never expect the government to build a stadium just so the CFL could expand, but it would be nice if they helped it along a bit, in the interest of expanding Canadian culture and history.
As for the ageing (is that how it's spelt??) stadiums, the government may be more inclined to prop them up a bit if they could be convinced that they're historical landmarks.
But ultimately, private investment is what it comes down to, and that's what is needed the most.