I'm gonna say priorities and lack of developed paddling routes.
People fill up their lives with many things. We all know we can't do everything, but many of try. When you're scattered so much it's hard to have so much commitment to one specific activity. Again, I think our society likes to have so many choices so people are too busy changing their minds as to what they want. Ooh..look at that!!!
My son can paddle his own canoe but I bet it's gonna be 15-20 years till he decides to get back in a canoe with some serious intent. He's got way cooler things to do!
How old are you SmithersBC?
Had you been tripping before you met your wife or is this something to provide activity for your family?
The East and South have maps, trip reports, warmer weather and water, drop and pool rivers, cel phone coverage (

), and the masses. All these add up to the user not having to invest as much time and energy in the same activity compared to one out West.
Sure the big ones are documented. Bowron, Murtle, Powell River, etc... step outside these and all information can start to get sketchy.
Therefore I think it's a lot easier for new participants to get started in these developed areas.
Paddling is another one of these that everybody thinks is real easy. Sure it is, but like anything it takes a lot of work and organization to pull it off in style. People that have been doing it for years can deceivingly make it look real easy.
These people that are distracted by life's other distractions often decide that it's too much work for not enough reward. Now they go back to the instant gratification stuff.
Anyways, keep up the good work!
Make yourself a canoe pole now. It's the next logical step.