This is a great basketball shooting drill to work on your shot mechanics, footwork, etc. but it is also a really good basketball drill to train yourself mentally as well. Sometimes in a game you will miss a couple of shots in a row. If you are a weak minded shooter this will cause you to stop shooting or hesitate on the next shot, which will probably end up in another miss.
Mentally strong shooters still continue to shoot though, because they know that they are a good shooter and that they need to have a short memory. The beat the pro shooting drill requires you to make a certain number of shots before you miss a certain amount. This will help you to be mentally strong, and learn to shoot even if you have missed a couple of shots at the beginning of the drill.