Technology is and always has been a tool. It is the thing that has enabled, our species, born with minimal defense, slow speed, and cursed with offspring that take more than a decade to fend for themselves, to become the dominant species and the planet while more than doubling the average lifespan. All this was accomplished in the blink of an eye by evolutionary standards
You really think we are weaker, because of shovels, chainsaws, back hoes, electric motors and the internal combustion and million other devices. or dumber because of books, films, databases, computers and smart phone. How is that even possible?.
The most successful species are the ones that work collectively, from bees, to wolf packs, elephants, and dolphin. What makes a society, more powerful and efficient than individuals is specialization. Some members of group, make babies, some gather food, and some fight. Money facilitates this specialist, so no I don't have to learn how to grow my own food, nor does the farmer have to learn all the computer stuff I knew. The computer stuff I did enables the farmer to be even more efficient at growing food (and bunch of others thing that he may find valuable or fun like watching girls get naked on the internet, or communicating on message board with people from all over the world.). The farmer keeps me feed, and money keeps us from wasting a ton of time trying to barter how many bushels of corn my computer skills are worth.
You are right if electricity disappeared tomorrow many would starve. But that would true even if we were as self-reliant as you think people were 150 years ago . The thing that would cause is mass starvation isn't the lack of skills but the lack of technology.