1. The OP did not make $10,000 in one day. 2. We don't know how well this would have done on a non-Facebook platform.
My point is that this is like arguing that Facebook is a wonderful platform because Apple makes a lot of money and Apple uses Facebook to advertise. Apple would be making a lot of money without Facebook ads, too; if a company using Facebook ads generates $X revenue, that doesn't mean those Facebook ads were responsible for a specific amount of the revenue.
In short: congrats to the author! But this doesn't really prove anything.