To counter your point, consider the fact that 4K video looks better when downsampled to 1080p than video captured directly in 1080p: https://www.youtube.com/wat

To counter your point, consider the fact that 4K video looks better when downsampled to 1080p than video captured directly in 1080p: https://www.youtube.com/watch?v=kIf9h2Gkm_U https://www.youtube.com/watch?v=kIf9h2Gkm_U -- the mechanism is different for other cases (social media sharing of images, for example), but the principle is the same.