a 36” sidewalk
So... About the minimum for a single person to walk with little leeway, normally in a safe indoor area with no car traffic?
36" is the absolute bare minimum required walkway space in the US by ADA to technically be wheelchair compliant in that a single wheelchair user might be able to use it, roughly half the minimum 1.8m clear width recommended by Australia's Department of Transport, and less than half the 2m minimum unobstructed walkway space recommended for pedestrians in low-traffic areas by the UK's department for transport. This is undeniably too narrow.
That road looks wide enough for about 4 cars, it's not a "waste" to surrender some of that to make it slightly less hostile to pedestrians.