On the one hand, I'm sympathetic that not everyone has a place to create a TV studio at home. On the other hand, there are easy ways to block out the light from a backlighting window and to add a key light.
Perhaps those people don't want to use a camera in the first place? It seems like camera usage isn't always optional. It wouldn't make sense for a person like that to put in effort to make it look nicer.
You don't need space, you can get cheap stands to put a keylight and mic above your monitor attached to a desk, wall, or with a stand. A simple hd logitech webcam can be attached to nearly any monitor.
