A gigantic source of light in the sky that lights up a part of the Earth and is too bright to look at is... the sun. I think we're all used to the sun.
What do you think is being proposed, exactly? Some sort of alternative sun that's going to shine on the entire earth, that we'll all be forced to look at?
No. I used a rhetorical device to highlight a theoretical monopoly we assume would never exist. But imagine I launch a space sail that can cast a shadow on any part of earth I chose. I could block or unblock sunlight at will and grant access only for paying customers.