Sure, but making a fun game can be luck. There will be developers that don't need luck (or are lucky to not need it?!). Rovio made _A LOT_ of games other than A

Sure, but making a fun game can be luck. There will be developers that don't need luck (or are lucky to not need it?!). Rovio made _A LOT_ of games other than Angry Birds; is making a lot of "bad" games and then one "good" not luck? I'm sure they set out and had equal confidence in each of their games being gold mines, before they were not or, in the case of Angry Birds, were.