Love the idea of "macros" for individual words, bc as a solid typist (130-140wpm) that's exactly what it feels like to me when I'm "in the zone" and really pushing. If you can read far enough ahead that you're seeing words and have a sense of the paragraph you're writing (or the paragraph you're trying to say if it's something original you're writing), words on a keyboard are kind of just collections of letters and easy to repeat sequences that you can hammer out within less than a second. It's kinda musical in a way, like you're swapping chords on a guitar or piano, and I envision chords on either instrument pretty much the exact same way - you're just throwing your hands into a default position without really thinking about the specific positions bc you know that this "form" of your hands makes this sound, so you don't have to think about how each finger on each string or key is making its own impact.

Obv this all comes with a lot of practice, and I've gotten a TON of practice typing from the nature of my work, but faster typing is absolutely attainable for anyone that can put in some time practicing.