A reasonable theory, given that weapon strikes from orbit are extremely subtle and stealthy, and matches have not been invented yet.

I know that when I secretly test weapons, I do it in a way that makes sure the effects will be in the news 24 hours a day for weeks and months.

Version 1:

"Did it work?"

"We, uh, dunno. We can't find what it hit."

Version 2:

"Did it work?"

<Turns on CNN> "Yup."

Kind of a shit weapon if you have no idea what you are hitting with it innit.

Some people believe the Earth is flat, too.