Comment by JyrkiAlakuijala

It is because JPEG is given 0.5 bits per pixel, where JPEG XL and AVIF are given around 0.22 and 0.2.

These images attempt to be at equal level of distortion, not at equal compression.

Bpps are reported beside the images.

In practice, use of quality 65 is rare in the internet and only used at the lowest quality tier sites. Quality 75 seems to be usual poor quality and quality 85 the average. I use quality 94 yuv444 or better when I need to compress.