There's a trade off between speed, ergonomics, and moving your fingers around the keyboard to find keys not accessible with your hands on the home row vs using all the keys on a keyboard.

Some people take this to its extreme conclusion.

That was my first reaction too but it's growing on me! With IntelliJ on an external Mac keyboard (because, 2017 era MBP, yeesh) for some reason they didn't group the F keys. I mean at least there are F keys. So it's always stressful to try to step over, because the continue button is right next to it (F8 and F9) and it's easy to lose minutes of context buildup with one wrong button press. And then, HTF do you force-step-out? Is it Alt-Shift-F9? Cmd-Ctrl-F9? Alt-F9? Oh it's Shift-F8. But unfortunately by now I just relaunched the entire project.

It would be so cool to mount a Soviet nuclear control room type panel under my monitor with those keys spelled out. Oh and a mute button.