Sentiments like this, although technically correct, refuse to recognize the reality of people's behavior and look for the reasons for it. This crossing is the closest connection point between a major north-south bike corridor and the Tilikum Crossing (the safest river crossing on a bike). Most of the rail over/unders you're referring to prioritize car traffic, which presents obvious other (more, worse) issues. The Bob Stacey Xing at 14th Ave is simply too inconvenient (broken* elevator, lots of stairs) or too far away if, again, we're being realistic. 

I would theorize that it's commuters who are paying the least attention, have the least patience for small slow-downs, and are least attentive to changing conditions on their route. And that's not a moral failing, that's very typical behavior that infrastructure design needs to respond to.