Your conscious planner may be making 1 decision/second, but your senses, proprioception, balancing system, etc. are handing you about a gigabit/second of data, most of which never rises to your conscious attention.

When I'm reading, that's roughly 2000 bits/second, but I am engaging it with model-making systems that can completely enrapture me.

I/O is not the same as computation; conscious computation is not the same as all computation.