At a $2400 price point. You should get a 1080p camera included regardless of your use. If you don't want that much detail on a webcam, you should have a setting to turn it down to 480p or something. But higher quality should the ceiling. Besides some people vlog and want that type of quality on facetime
At a $2,400 price point I expect a usable computer. I sincerely don't care about the camera - there's a 4K one in my pocket that interfaces instantly with my computer.
At a $2400, other users want high quality video. The computer should have the option for both audiences. Don't want high quality, fine just turn the setting down.