The point is they are upscaled to 1080p and few are produced at 1080p. Yes, I didn't label every in-between resolution that they get produced at. This seems rather needlessly pedantic, since as you cited, the resolutions are in the link I provided.

Would you feel better if I said "they upscale 720p and 837p and 900p and 810p and 806p and 873p and 864p and 957p and 878p and 719p to 1080p"? I excluded non-standard resolutions for simplicity since it doesn't really change my greater point: most 1080p releases are just upscales. 19 of 41 listed are 720p and 720p is the most common resolution listed.