I came across this great quote from Steve Jobs about craftsmanship, “When you’re a carpenter making a beautiful chest of drawers, you’re not going to use a piece of plywood on the back, even though it faces the wall and nobody will ever see it. You’ll know it’s there, so you’re going to use a beautiful piece of wood on the back. For you to sleep well at night, the aesthetic, the quality, has to be carried all the way through.”
This is the basic challenge of craftsmanship--is the standard perfection all the way through, or is the standard some measure of "good enough and done."? I have a project right now where the client has asked me to complete some unfinished woodworking left behind by a beloved uncle. They want to match his standard of craftsmanship. Does anyone's woodworking stand up to being examined with a magnifying glass? I have been looking closely at the fit of miter joints, pin nail holes, veneer bedding, and many other fine points of craft.
In the end I think the point is that quality and care should go all through a piece. The bottom of the box should be finished with as much attention to detail as the showy veneer panel on top. This element of craftsmanship is not a question of skill--you showed you can do it on the show face--it is a question of heart, the willingness to put a little extra in to the work.