It's been a very long time since humans haven't been dependent on machines. There's a legitimate question to how complex the supply chains are that produce those machines, and whether as a result it makes society and civilization more fragile (if I'm dependent on farm implements from a blacksmith in the center of town, that's different from being dependent on LED displays only made in 3 factories in the world, all of which are on the other side of the planet). But I think the general idea of "don't become dependent on machines" is a ship that sailed long before any of us were even born.