As someone who obsesses online over my mechanical keyboard (cherry mx clear today, but I have a collection), system hotkeys and .vimrc, I actually generally agree with this. Code entry time has almost nothing to do with software development productivity. It's just stuff I enjoy, and the fact that people get obsessed by it shouldn't confuse you any more than the myriad of other things people obsess about online. Learning to save a keystroke in vim is really just my equivalent of learning to kill a certain monster in a video game.

On the other hand, I'm generally shocked when I meet programmers who don't know their tools at all, and in my experience that really does correspond to poor productivity. I'm not talking about people with average typing speed or people who use toolbar shortcuts rather than hotkeys, but programmers who don't know how to auto-format in their tool of choice or who stop typing every few keys to reach for the mouse, click file and then save. There's a mindset that goes with effective software development, and a natural curiosity and a constant desire to do things just a bit more efficiently are key factors in that mindset. People who are constantly getting out of the flow even in their editor of choice because they haven't learned to use the tool efficiently might not have the right mindset for software development.

But yeah, I recognize that the vim golf stuff is silly (but fun!).