Trig, I understand your argument, but you're wrong.
No, I'm not trolling. Light is my trade. Has been since the Johnson administration.
But don't feel bad, a lot of people in the business get it wrong, too. Once they learn the inverse square rule they think it applies to everything, everywhere because no one ever tells them different. It does not. It applies only to a sphere radiating into 360 degrees. (same with sound) If it applied to projectors, flashlights, spotlights, lighthouses and lasers, they would be of little use. The laser is best example of this.
Stop and think about it, don't just fall back on what you "think" you know.
EDIT: Typos