> I don’t consider this in any way to be a dealbreaker.
Fair enough. But for some people it might be.
It is much more comfortable to perform video calls via laptop than via phone because a phone typically needs to be held in position manually. Therefore, I believe that most people would, if given a choice, prefer to use a laptop for video calls.
Also, people might actually want their video to have high resolution. For whatever reason. Even to show their facial flaws. Not providing them an option to do that, despite the fact that the required hardware is cheap and available, is an unnecessary restriction.
Finally, if a high resolution camera was included and someone would not want to use that high resolution, they can simply switch the camera to a lower resolution mode.