Language is more expressive, but I can press hundreds of buttons and type commands faster than I can yell expressive commands at my computer

I think it's very unlikely that any significant number of people can type faster than they can speak.

Depending on the complexity of the task, you might very well have to press "hundreds of buttons" in order to achieve the same result as a single sub vocalized voice command. Not to mention that speech can be far more intuitive than keyboard shortcuts or nested sub-menus for certain tasks.

Again though, this isn't about replacing keyboard input, it's about supplementing it.

Yeah, but I remember spending 20 minutes driving on the highway and trying to get google assistant to play the next episode of my podcast (Not the most recent! The NEXT ONE. Gaah)

It would be 4 taps to get done, and it is impossible to do via voice.

Similarly, I still have no idea how to get Siri to add a stop on a route instead of replacing the current destination.

Even worse, if you even use the word "stop" in a sentence it doesn't understand, it cancels the current driving directions.

Chorded typists write faster than speech needed to transcribe court sessions for example.

Also math is an example where you say oh so much more than you can with language.

The way I see it say a shell interface is a different language and it's so much more expressive.

or for example imagine playing a FPS with voice commands.