Your dreams and imagination evolved as a view into another universe. As with the current beliefs, you cannot decipher technical information – no words in books, no details of how devices work, so even if you can describe things you see from another place, you could not reproduce a working version.
Now how do you convince others that the things your are seeing are really happening without being labeled insane? And how could you use this information to benefit yourself or others? Take a peek into the multiverse to see how other versions of yourself have solved these problems…
Oddly enough my own (limited) experiences with lucid dreaming didn’t really break down the barrier for technical details. Sure I knew I was dreaming, I could think about and control what I did, but I still couldn’t read a book. When I was younger there was a time where I kept having dreams about writing books on various subjects, it felt like I was actually planning out the arrangement of topics and writing down the words, and yet as I woke up everything was lost. So did I actually compose a story (because yes, I’ve written some short fiction) and then forget the whole thing, or did another version of me write down the stories and I simply couldn’t bring that knowledge back with me from the parallel universe?
Your experience is anecdotal. There are countless documented cases of people being not only in control while lucid dreaming, but also remembering what they did. It’s just that there is a limit to what you can do in dreams, because they have a purpose and trying to force too much through lucid dreaming ends up damaging your sleep, which your brain will do everything in its power to not let happen.