[layer8]

Not sure about the drummer analogy, because we don’t type in a rhythm. Hands and feet can maintain the same rhythm, and that has the effect that their actions can coincide with high precision. For arhythmic actions, my experience is it’s more difficult to synchronize to the typical subsecond precision for typing. For example, drum your fingers on a table in sequence, and then try to replace one of the fingers with your foot. It is magnitudes slower. While training will improve it, I don’t think it will be able to match the finger drumming, unless you introduce a longer-running rhythm. Keyboard shortcuts are similar.