maybe it shouldn't have been "techno dad to the rescue", but rather "dad spending a moment with his kids showing them how to setup a raspberry pi/their xbox/etc.".More than this, I think that in part it's necessary to allow the kids to try and fail before assisting them. I'm not sure that showing and explaining to them how to perform a task from start to finish is much more effective than solving the problem behind a closed door, at least in terms of retention. What's really effective is if they can make an attempt to solve the issue, and then get the solution. Unfortunately, my experience is that not very many parents take this approach, because it includes failure as part of the learning process--and not many parents like to watch their kids fail. I've even seen some parents condemned for telling their kids to go and try it themselves before they provide help--some parents regard this as some kind of neglect.
The goal is to have the kid get 90% of the way there (or however close they're capable) before closing the gap and assisting them with the remaining 10% that they aren't able to get on their own. Part of the issue is that in the eye of the learner (and an observer) is that 0% of the way there and 90% of the way there feel the same. Both of them amount to "I can't do it and had to ask for help." But if you've gotten 90% of the way to a solution yourself, it's much easier to understand when the final (and hardest) 10% is demonstrated for you, and odds are you'll retain at least part of that. Whereas if 100% of the task is done for you, you'll frequently retain none of the solution, even if the solution is accompanied by a lengthy explanation.
In school, I found that I learned most effectively when I attempted the assigned homework before the related material was covered in class. I tried, I failed at a lot of things, and when the lecture came up, I knew what information to look for and what questions to ask. Failure is a critical part of the learning process--it's unfortunate that many people try to avoid failure rather than embrace it.