If you used nothing but nails to build various styles of beds, you wouldn't have the same experience sleeping on them as the originals; Unless, of course, the original was a bed of nails.

Sharp edges are just one texture in an infinite range of textures, and AVIF looks like it constructs everything out of sharp edges in a way that's really obvious to the eye at all compression levels.

With JPEG XL I can at least tell what's missing, or too artifacted to make out. With AVIF you have no idea what has been completely erased.