I believe what he is saying is something we say very similar in karate. We say a weapon is only an extension of your arms and hands.

In this same way a machine is only an extension of the body and mind. It does everything we can do with our bodies but better. Example we see with our eyes, we have electron microscopes to see the surface of one grain of salt. Now even though this machine can magnify that much, who is doing the looking? Therefore the machine is nothing more than an extension of the scientist's eyes.

A blowtorch can cut steel in two, but without a welder to operate it, it will just sit there useless. A computer can figure out incredible things but to who's benefit? The person operating the computer that wants to know the information.

Everything a machine does is to serve man.

Machines need people or they have no purpose. Example the Mars rover can dig for rocks to bring back to Earth by it self but if there were no people would it make sense to do so with nothing to inquirer about those rocks? It takes a curiosity to want to know and not only curiosity but a sense of adventure to ponder what can we do with these rocks?

Machines have neither curiosity nor any what if adventure. They only have what do I do next programming. Even artificial intelligence is very primitive to human need for what could be, what can I make from this and how far can I go?