Coding used to be bottlenecked by typing speed; now, it’s bottlenecked by our ability to comprehend and maintain.
I highly doubt it was ever really bottlenecked by typing speed. If _that_ is your bottleneck then you either don’t care about what you write or you have a perfect plan laid out and just need to type it in.
In fact, writing a video game engine is probably the most common project on the planet to the point there is hardly anything novel about it. That's how engine writing nerd snipes people. They get to feel secure due to the guaranteed possibility of success. Making and designing an actual game that people want to play is much more risky and it is much less dependent on programming skill.