What I am surprised about is that nobody has made a high quality UVC camera with a large sensor and great lens, specifically for videoconferencing.

Even the "good" webcams (like the Elgato FaceCam and Logi Brio) have tiny sensors with small lenses. And iPhones (with Reincubate Camo) have bigger but still relatively tiny sensors.

Pair an APS-C sensor with a ~24mm f/2 lens, with no controls; just a USB connection. This would barely be bigger than the lens itself (think double the size of Apple's old iSight).

I'd easily pay $400 or more for this just to avoid messing around with mirrorless cameras and trying to mount them and use their drivers or HDMI capture USB interfaces.