> Look, most modern software is spending 99.9% of the time waiting for user input, and 0.1% of the time actually calculating something.

I'm sorry to say that this argument is not even wrong.

As programmers, it is not useful to us to think about that 99.9% of time. The 0.1% of the time is literally our entire job.

"Most of the universe is not Earth, so why do we spend so much time thinking about things on Earth?"