about such things - that's progress. When I was young my father spent time teaching me to set spark plug gaps with a set of feeler gauges. I never needed to do it, and if I open the bonnet of my present car I hardly recognise any of the components - most of the engine is enclosed in an aluminium casing and the engine management system takes care of everything. I wouldn't dream of tinkering under there.
It's not necessary to know how computers work in order to use them either, and that's fine.
As technology advances and becomes easier to use on the surface it gets more complex behind the scenes. That's OK because the chances that any of us will ever have to understand the inner workings of a hard drive or a scanner are remote. The world has changed, and technology has liberated us from all that. Electronic components aren't user-serviceable and modern black and white goods goods are manufactured to work for long periods without needing any maintenance.
We've reached the stage where we've almost stopped making things for enjoyment - when did you last see a group of kids flying model aircraft they've made from kits, or building their own bikes? Some might say it's a sad thing, and that young people lack the ability to understand the physical world through their hands, and they would be right to an extent. On the other hand, watch any 12 or 13 year-old playing a computer game, or sending text messages and you'll see manual dexterity until the cows come home.
Each age has its ups and downs, and all older people are guilty of the "It wasn't like that in my day" syndrome - we'll all do it, whether we think so or not. In truth we are lucky to be alive in the 21st century, the rate at which technology is pushing forward is astonishing, and someone from even 50 years ago would hardly recognise the contents of the average home.
Young people are quite capable of understanding as much about modern technology as anyone else - it's just that they don't need to know about the nuts and bolts any more.