»they do in fact have the expertise necessary to decide whether JPEG-XL is something they want to do?« The problem is that they do have the people with expertise but those were not asked. For example, the AVIF team at Google does not have the expertise — they have proven that publicly (there was a AVIF vs JXL comparison thing that got put out) and later on an response they gave to Sneyers (the response got shared on Discord).