In the small village where I live, they don’t really scrape the snow off the roads until enough cars have driven over it to turn it into ice. By the time it all begins melting in March, it can be six or so inches thick. The roads underneath are, by then, a pot hole mess.
They don’t really shovel the sidewalks either — even in the neighboring town. From late November to early March, then, we all slip through our days rather than walking. No matter what kind of soles you have, nothing really helps when you’re walking on ice.
If someone slips and falls, well, it’s just her bad luck and worse balance. It’s not the shopkeeper or home owner’s fault for not having cleared the snow in front of his property.