I tend to wear less gear when I'm commuting than when I'm actually going for a ride because I know I'll have to walk around w/ all my gear once I get wherever I'm going.
So you wear less gear when riding in the most hazardous riding conditions? Where's the sense in that?
If your gear is uncomfortable to walk around in, you've got the wrong gear.
ATGATT
I have two sets of gear, track and street. The only difference is a comfort factor. But I still wear a full face (well, flip-up), back protector, riding boots, and full body coverage with armor, no matter where I am riding.
I don't ride in just jeans, or ride without my back protector, or riding boots, etc just because I think there is a smaller threat.