I agree that as technology becomes more advanced the origines of those technologies become forgoten. Even the people who know how to build certain parts in say, a computer, don't know how to construct the entire computer from the very essentials of which it is composed. Sciences become more and more specialized and this makes it difficult for anyone to be a complete generalist. If we were to go into another Dark Ages like period of little scientific progress or suffer some catastrophy, would anyone know where to begin to rebuild?

However I dissagree in that technology has had a large impact on the day to day lives of humans even prehistoricaly. Any practical application of science is technology so humans have been implementing it for a long time and often not understanding it. Most people don't understand the chemical reaction behind fire, but this does not stop them from utilizing it.