It might be appropriate for them and the community. We don't need sidewalks connecting farms, and maybe if the neighborhood wasn't built with walkability / accessiblity in mind, people who need walkability / accessiblity don't live there and it'd be burdensome and wasteful to make it more accessible than anyone demands it to be.
I think it's weird to make sidewalks your hill to die on but without context it seems like it could be a reasonable policy decision.
IMO, it's a way to fight the in-demand construction for today, which is medium density apartments, and more kids looking for access to the schools.
There's a lot of dynamics at play. People who own property don't like the mandates because they potentially impact the value of the subdivided value (the builder makes the sidewalks, the municipality maintains them), many people don't want more people & school enrollment because that drives taxes, and old people are afraid of people who ride the bus for various reasons.