At least Look has rubber inserts under their cleats to help get a little bit of traction, if you keep your heels up, off the ground, while walking.
I still remeber before the mid 80's, having to walk around on my Diadoras, when racing bike shoes for clipped pedals did not have any rubber traction pads, just 100% slippery plastic soles and cleats and a couple of also very slippery cleat mounting bolts.
Eventually the soles and cleats get beat up enough that you do get a bit of traction.