I disagree. A keyboard enforces a clarity and precision of information that does not naturally arise from our internal thought processes. I'm sure many people here have thought they understood something until they tried to write it down in precise language. It's the same sort of reason we use a rigid symbolic language for mathematics and programming rather than natural language with all its inherent ambiguities.

Dijkstra has more thoughts on this

https://www.cs.utexas.edu/~EWD/transcriptions/EWD06xx/EWD667...