It's not Luddism, because the "tech" in question here isn't technology but consumerism via consumer technology. When everything is abstracted how it is nowadays, the technological aspects are hidden from the end user. Teaching your kids to tap on a touchscreen doesn't constitute technology. Neither does knowing how to use an online search engine, or resource like, say, wikipedia. All of that an abstracted package that just happens to utilize technology on its backend, which the end user doesn't require to know or understand. All that is required is memorization, to familiarize oneself, mostly of UI elements and how all this abstraction links and works together. To be against the growing societal trend that fosters a dependency on these resources and the habits that form with them isn't to be against technological advancement.

And how are you supposed to teach kids about privacy when most consumer technology from the get-go is privacy harming? If you buy a child their first smartphone, do you tell them to not use SMS because it's plaintext, to not use any of the popular communications apps because they're owned by FB or whoever else, or to not use their phone at all because of cellular location tracking? How to you explain to them they can't watch Netflix on the TV, because the TV isn't allowed to connect to the internet to prevent it phoning home? No, convenience trumps all, and we all know the current state of things is that even if people are made aware of privacy issues, they'll disregard them if even slightly inconvenient.

There is no responsible way to "teach" consumer technology, at least not the way you mention. I mean, how exactly is the generalization "too much tech isn't good" relevant to technology? This is just common sense, it applies to everything. If kids are staying up late reading comic books and subsequently performing poorly in school, this is no different than the habit of staying up late on your phone. And, I reiterate, the latter has nothing to do with technology but with consumption. You either foster a (ever-growing) dependency in them, or you don't. And as you write, the former is inevitable, but then so is a lack of privacy, and so are the bad habits that are inherent to consumer technology.