What it comes down to is management and psyche, plain and simple. North Conway has a huge influx of tourists, business meetings, vacationers, and climbers. There is a client base for climbers, team building sessions, birthday parties, camps, etc. However, the current gym is tucked in the back of Canmore, there is no active management or manager for the gym that is with the wall 24-7, no advertising of any sort, no real route setting, no new holds, and plus their is no climbing society within the local climbing culture that is psyched up enough to do anything about it without getting paid . Maybe the real rock climbing around North Conway has a perception of not being inspiring to the climbing culture that exists here? We have tons of good rock and tons of boulders, lots of bad weather (perfect for indoor climbing), but there are only a select few that see and percive the resource that makes people want to go into gyms and pull on bad holds until they can't feel their arms a couple of times per week.
Not to be too stereotypical but North Conway is back water. It is not a urban/urbane place with climbers that have office jobs and want to go to the gym after work and take laps on 5.13c's like they do in a lot of places besides North Conway. It is a town of climbers living off the tourist industry. People would much rather go outside and ice climb, take a hike in the Whites, or get a couple cold ones, rather than pull plastic in a dusty gym under sodium lights. That is very understandable and a good thing. North Conway is not Chamonix or Boulder. So I guess what it comes down to is the culture or the individual, or an individual that wants to make an investment and create a (paying) and psyched culture in the future.