Not at all. Wider != more delineation. Analogy: it's easier to cross a lawn than to scale a wall. Edge-like features create an intensity wall in the image sig

Not at all. Wider != more delineation. Analogy: it's easier to cross a lawn than to scale a wall. Edge-like features create an intensity wall in the image signal, whereas plateaus of do not. There's a clear biological / image processing basis for this.