As someone that started in computing when affordable computing was all about keyboard, and mices only existed in computers with prices similar to buying a car or a mortgage, I don't get the hype of keyboard == hacker mentality. Specially since that on my hacker circle of Demoscene, during the 16 bit days, we were mostly on Atari and Amiga systems, then we had plenty of mouse time, and no one ever stop to wonder we we…
its a productivity thing, would you rather type text with a physical keyboard or would you rather use a virtual keyboard and mouse? you can miss more easily with a mouse and have to adjust the position of the cursor to line up on two axis before any action
The "line up the two axis" thing is immaterial, and has no practical impact on actual productivity.