It is exactly reality on some roads in my area. My town is growing and decently high income for the area, but some of the very first neighborhoods have drainage ditches along the roads rather than proper storm drains. So they are smaller, less expensive houses, but they are in the center of town with good access to everything.

So that leads to lots of sidewalks being built, trying to make things more connected and walkable, but certain roads have this exact “we painted a line and a walk symbol” sidewalk. The walk symbol looks correct though, not the weird one in the op.