Since most of use ride our fixed-gear road bikes on the road, I think it makes sense. People increase their fitness and start going for longer rides, and suddenly Dickies don't cut it for 40 miles of rolling hills in the heat of August (at least, I wouldn't try it). I always explain it like this: Would we willingly wear clothing that looks like that if it weren't really effective? For most of us, no. The fact that so many serious cyclists wear it is a tribute to just how effective it is.