That isn't true at all.Pure Audio Blu-ray is just a way of authoring the Blu-ray menu. But it can include video and all multimedia the producer wants. I actually have some with some Video-clip option in the menu.
High Fidelity Pure Audio is a marketing initiative that comes along with "..three 24-bit/96kHz or 192kHz high-resolution audio files. These audio-only (no video) discs will include uncompressed PCM digital, Dolby TrueHD, and DTS Master Audio encoded files."
Different labels varied the behavior of the menu basically allowing stream selection without an attached head.
And of course, without the HFPA banner at the top of the case, others have released high quality audio on blueray for years.
I would be curious to know if the ones you have with video have the HFPA marketing text or not.
Now I freely admit I can be discussing this position under a previous misunderstanding related to the marketing spec. Nothing I have read says otherwise and Mark Waldrep's post here is particulalrly interesting.
http://www.dvd-and-beyond.com/display-article.php?article=1935
some additional articles.
https://web.archive.org/web/2015052...e-audio-format-brings-hi-res-audio-to-blu-ray
https://www.cnet.com/tech/home-entertainment/deja-vu-yet-another-high-resolution-audio-format/