there are definitely times for many of us when we prefer not to be clipped in (such as this example, on a sketchy road surface, like gravel or ice, etc.). It is also nice sometimes to have the comfort and freedom of a plain-old platform pedal.
Different strokes, but... Those are the times when I most want a secure connection to my pedals.
There is one reason why I might want "a plain-old platform pedal", that is times and places where I might want to not bother with bike shoes. For me that is usually only around town at home for short errands.
Not knocking it if others find platforms comforting, but all of us do not.
Why not have both? I love hybrid pedals like these ones below -- why not have the best of both worlds?
http://www.shimano.com/publish/content/global_cycle/en/us/index/products/pedals/road/product.-code-PD-A530.-type-pd_road.html
Not the same pedals, but my daughter used a pair of "campus pedals" on the Trans America. I asked her if she would make the same choice again for a long tour. Her response was "probably not". She said that it was more trouble clipping in, which she did very nearly every time she got on the bike on the TA. The only exceptions were when she hopped on the bike with her Crocs to go a few hundred yards max to the shower or someplace else very close to camp. For that short of a distance we found we could manage the Crocs with two sided SPD pedals. (or walk)
She did say she really liked the campus pedals for around the campus at college or around town at home.
I like them for my folding bike, but I never use it for more than a few miles at a time and often with running shoes. So they are great for that.