There is nothing wrong with mass produced bikes as long as you fit the mold... for those who don't a custom bike may be the only answer and then there are those people who really appreciate the time and exquisite level of craftsmanship that goes into a one of a kind, made for you and you alone frame.
And when you get really good at what you do the lineup for your work can become very long.
Ask East Hill how much she loves her Sachs as even though it was not built for her specifically, it could have been.