I agree with most of your comment, but hiking for hours is pretty substantially different from the amount of walking you do in walkable areas. Particularly beca

I agree with most of your comment, but hiking for hours is pretty substantially different from the amount of walking you do in walkable areas. Particularly because, by definition they have shade and places you can stop for cool drinks etc. Thr notion that walkable areas aren't always good is a pretty silly conclusion to draw from the tragedy you cited.