Ian,
Originally, back like a long, long time ago when I contemplated going on my month-long sovereign to Scotland in 1996, I thought the same about the 1st at Machrihanish, as I had interest in the hole and its carry, which at the time had me thinking what the definition of a "Cape" was. Over time, the experts told me I was wrong, that it was about the angle of the green which junted out past the "curving coast" of the body of water.
Still, to this day, I associate these types of hole with or without the junting body to be Cape-type holes, even though the definition is a headland or a promontory which extends itself into and marks a change in the coastline.