About luck

You wad up a piece of paper and throw it toward a wastepaper basket ten feet away. (You should have recycled it, but this is to make a point.)

You're not good at throwing things and in this case your throw is even farther off than usual. 
But.
The paper hits a wall, then a book on a shelf, then the leg of a table, then the rim of the basket where it stops for a fraction of a second as if deciding on whether or not to go in the basket or on the floor.
Then it falls in the basket.
You applaud yourself for this lucky shot and wish others had been there to see it.
But.
There was no luck involved. Everything about it was determined by physics. Biology too, considering that the signal your brain sent your throwing arm was misinterpreted, but biology at its tiniest level is physics. 
There is no such thing as luck. Why, then, do I believe that my luck is nothing but bad?