Brilliant @ggbutcher, the color.org sRGB_v4_ICC_preference profile makes the rendering intent work. Here are perceptual and abs. col. outputs. These make sense to me.
I haven’t properly read the Elle link yet, but oddly the color.org perceptual jpeg is the same as the abs. col. one made by “sRGB (web-safe)”. All the web-safe renderings are the same I reckon, and perceptual. I’ll think about that tomorrow maybe.