Well, I am sorry if I was unable to make my point more clear. I am really happy to be given the possibility to craft Elven, Dwarvish and Daedric armors. 
My concern is that such abilities should be deserved, and so require some investigation or quest to be unlocked.

My concern is that such abilities should be deserved, and so require some investigation or quest to be unlocked.
You do have to become quite an accomplished smith in order to learn them, and in order to become an accomplished smith, you have to work with a variety of metals and materials when working with your own armors. Reverse-engineering makes perfect sense... the perk just indicates the point from when you move from "Hey, I can work with this material" to "Hey, I've worked with these materials so much that I can understand how they were made in the first place! ... Elven armor has a lot of inefficient flaws: there, I fixed it. I call it: Epic Elven Armor! Better than the original!"
Picking the perk may even represent a "Derp" moment for the character.