There's a lot of unrealistic things in the game. It would be a very long list. I've complained about several myself, and generally, people have told me to shut up because they don't care. In that spirit, I honestly do not give a shit about crafting and could care less about crafting realism, especially if it means making a more annoying crafting system.
Which makes me wonder why you are reading a crafting thread?
Why don't you propose a workable crafting solution.