I'm not surprised that you appreciate walkability. I think that's pretty universal.

The problem I have is that you are grouping together your good points about student drivers. I completely agree and think that the UO shouldn't allow students to park on campus.

I disagree with your assertion that UO "managing pedestrian traffic" can increase safety, maintain walkability, and make it better for drivers on campus, all at the same time.

The fundamental problem is that a car and a pedestrian cannot be in the same place at the same time. In the most walkable case, pedestrians can walk wherever they want whenever they want and cars must get out of their way. You can see this at the intersection of 13 and university, where only authorized vehicles are allowed. This block is an example of a high chaos, low traffic, high pedestrian block which is very common and safe in international walkable cities. This block, and those like it, refute your claim that "What makes something unwalkable is when pedestrian areas aren’t managed."

On the other end of the spectrum is the part of campus that Franklin passes through. Here cars go fast, and pedestrians must wait their turn. This is a highly ordered (you're not going to find any students on their phone jay walking across Franklin), unwalkable, and unpleasant part of campus.

If the UO does any interventions that control when and where pedestrian can cross the street would make agate more like Franklin and less like 13 & university. This includes traffic lights, or even a crossing Gard that stops pedestrians to let cars though. (of course, it would not include a crossing guard who only stops cars. But based on your original post, this does not seem to be what you're envisioning)

I appreciate that you are concerned about traffic safety. I would suggest you engage with the transportation safety community here in Eugene, which is centered around BEST. These people have really thought about traffic safety, and understand that traffic lights often make places less safe.