How is it "way better" than using HDMI to USB capture device? I've been using my Sony RX100 IV and a CamLink 4K since April and it's been flawless. No software to install, just appears as a USB device to all my video apps, Skype, Zoom, FaceTime. Hundreds of hours of use without a single issue.
Not sure a buggy software solution that apparently isn't working for many, and hasn't even been available until now, can be called "better". But I'm glad it's working for someone. Obviously the "free" aspect is nice, but I have zero temptation to try it from all the reports. Sony's about 5 months too late.
As far as poor camera quality in the Mac laptops, I have to agree but it goes beyond that. I use an external 27" monitor with my 15" MB Pro and keep the main Zoom gallery on the bigger screen. An external camera was more about being able to face that screen when conversing, than the quality of the MB Pro camera. But it's definitely nice to have the Zeiss glass and higher res as a bonus.