My point in connecting more parts of the city to the network is to guide future growth and limit, at least a little bit, the sprawl.
Also, bringing the LRT to residential areas further from the core, we don't alienate these people from the areas of interest (Whyte, Downtown, 124 St) and give lower income/cost transit options other than the bus (which is a terribly unreliable mode, generally speaking).
Also, I don't see Whyte or Alberta Ave getting LRT in their ROW, not for some 40+ years, to say the least. Best I can see is BRT or streetcars, and even that is a bit of a stretch. Besides the construction costs of doing such interventions and the backlash that would come from the disrupted businesses, there's the question of the actual benefits of doing so. Realistically speaking, I'd settle for narrower parking exclusive lanes, wider sidewalks, a dedicated bus lane on each direction, a median and no more left turns between 109 and 99 streets, on Whyte ave.