You know, to me, that is one of the things that comes with being a craftsman (craftsperson) who cares about what they do. It's not the same as mass producing something spec'd onto a CNC machine. In some ways, it's the difference between toil and art.
I have never been particularly skilled at anything other than music (and how skilled I am at that is highly debatable), but I was an art major for a while and like I say, have done some metal work and leathercrafting (did the latter professionally for a while) but I understand the drive of thinking "This represents me. It's possible that someone may be holding this a century from now and will marvel at the perfections and imperfections...the quality...someone cared...someone made sure this was done right."