Plus, the terrain near the coast here is an absolute bastard for point-to-point roads.
You'd struggle to make the alternative road any more efficient than the existing b-roads.

That's a natural spit of land (there is another technical term if it has land at both ends I think?). It was there, and flat, so they built the road on it. It wasn't built for the road. (....probably)

Dun Point fingers at them, they'll get Cross!