The article didn't address why people don't notice cyclists. But it did attempt to explain how people fail to see cyclists. In that sense, it offered a decent theory on the function of sight, and offered ways for me to test the theory for myself. I appreciated the attempt to offer insight for the problem of car vrs bicycle accidents.
I know as a road user, if I want to be confident of a clear path through an intersection (or other traffic hazzard) then I always check more than once. I've personally had the experience of a vehicle being obscured by the A-pillar, and I would have been t-boned if I hadn't made a second head check.
Different people have different flaws and problems. That article was an attempt to address one type of problem.