This is probably just my own ignorance, but I do not understand why seatd allows me to control the video display and access input devices, so that I can use a Wayland compositor without being member of video or input groups, but I cannot play sound or use webcam without being member of video or audio.

Is this out of scope for seatd, or is there something I'm missing? Naively, I would think that being seated should let me play audio and webcam.

Thanks.