There should be stats on who is at fault. It's a good question and it would have been nice if the article addressed it.
 
In Halifax the majority of vehicle/pedestrian collisions are in crosswalks, and as the article states, the biggest harm done to older people. 

We should be making evidence based decisions, and there isn't enough evidence given in the article, but I'm extrapolating that a strong majority are driver error. 

Those simply saying "it's the pedestrian's fault!" I think are having a knee-jerk reaction.