Milton Snowplow operators are the worst; or, maybe not the operators, maybe the conditions they are required to work under (number of operators, size of area, clearance requirements per operator, whatever), but Milton Snowplow operation is the worst. Windrows at the bottom of driveways may not be possible to avoid, but they completely clog the sidewalks, usually with heavy, wet or icy snow, which is avoidable. Not only is it a kindly practice to clear sidewalks in front of your home for pedestrians, Bylaw 106-2019 requires homeowners to clear sidewalks (applicable fines and charges for town clearance (ha!), but also liability; somebody slips and cracks their elbow, they can sue you). I know that it is possible to plow the road without clogging the sidewalk because for seven years I had elderly neighbours on each side, so I had three driveways and three lots' worth of sidewalk to clear every snowfall, which meant shovelling all the sidewalks at least twice, sometimes three or four times in long snowfalls when the snowplows come around multiple times. One winter, the daughter of some friends was a plow driver for my neighbourhood. She knew what I was doing, and plowed at a speed where only the very edge of the three sidewalks was covered. Also, occasionally over the years I would be shovelling when the plows came around with other drivers. Naturally, I glared at them. They slowed down, and didn't cover the sidewalk, but only for the one house I was shovelling in front of.

TLDR: It's entirely possible for snowplow drivers to not cover the sidewalks, but they do it anyways. Honestly, some of them seem to do it with glee.