Why bother doing hidden work right when no one will see it?
You are standing at the quiet test of every craftsman: the joint no one will open, the surface no one will check, where care costs you time and buys you nothing anyone can see. Feeling the pull to skip it is honest. What you do next is what actually makes you a craftsman or just a seller of furniture. Here is the thing the buyer never sees but you cannot escape: you know. Every piece you make carries the truth of how you made it, and so do you. Cut the hidden corner and you have not fooled the wood or yourself; you have just quietly agreed to be someone who does. Do it right and you become someone who does that too. So treat the hidden joint as the real test it is. Do it right this once, on the part no one will ever see, precisely because no one will. That is not waste. That is you deciding what kind of maker you are, in the one place where only your own standard is watching.