It talks about using technology that is restricted to personal knowledge. Rather than working machines that are so simple monkeys can use them.
Some of it is ok. But I have a hard time applying the concepts. Some examples that I thought about after reading it are:
I shouldn't have a car unless I know how to make the car.
I shouldn't use electricity unless I create the energy myself.
I guess some concept are reasonable, like don't rely to heavily on machines, and accept the imperfection of very day life.
What do you think? And Why did you ask?