Let me give you another example that maybe drives the point home better: Have you seen the videos of how Minecraft was made? A very short amount of time was spent on getting the I/O to the filesystem to work, of setting up a window and filling it with colors, of creating the basic 3D world. I believe that is a huge part why not everybody can write a successful game as Minecraft. Because I don't have trained the routines, I need to spend a considerable amount of time getting all these basic things done before I can start with an actual 3D game. Thus an experienced game developer is already done with his first demo in the time I am done with the basics. And at this point he has a demo to show for, I have nothing. So he even gains more motivation in the same time to continue, and he may even gain some first user feedback. This will make him code longer (huge benefit, I give up at this point) and he will also develop more in the direction that is fun for players (huge benefit two).

It is hard to connect directly the geometrical transformation math to making a game that is more for the players. It is in fact not directly connected. But if you don't sit down to learn the "boring math" you can't get there. That's what typing faster is for. It's not yielding benefits directly. But if you learn that, learn your text editor, learn your language, learn some design concepts, you will reach a level of competence that is not reachable without. Of course you could also do other things to get the ideas from your head into the computer faster, like voice input, or flow programming with touchpads. But then you need to get into these very well to get them out of your way as well.