If your first premise is true, then only old people would have developed this prejudice, and the article's headline is false.
But they don't necessarily understand the technology they're using. For example, teenagers these days are addicted to their cell phones, and texting is such an integral part of their social lives that taking away their cell is tantamount to locking them in a room for all the social isolation it causes.
They are expert users of technology, yet they don't necessarily understand the technology they use. As an example, if you give a teenager a URL for a page with information they need, instead of typing/copy-pasting it into the address bar, most will type 'google' into the address bar, put the URL into the search box, and click the first link.
Just being a highly proficient user doesn't make you an expert. Young folk are highly proficient users of technology, but they're not experts unless they've deliberately learned how the technology works.
Kids getting consoles and similar hermetically-sealed boxes depresses me.