[quote name='alembic1989' timestamp='1422095306' post='2668581']
I guess what I'm saying is that if I pulled the trigger on such a kit and added high quality hardware is there any reason why it can't be every bit as good as a high end boutique bass?
[/quote]
So many, many reasons, a lot of which has already been covered in this thread.
It is how the wood is worked with by a skilled luthier that sets apart the cheap from the expensive. You could have the finest quality pieces of Ash and Maple in the world with the best hardware, pickups and preamps money can buy, but with all due respect you will not make a bass of Dingwall/Roscoe et al quality. That is why these companies exist, otherwise we would all be doing it
People talk about big names selling instrument, but ask yourself how they became big names? Fender, well, for obvious reasons, but the likes of Wal, Dingwall, Roscoe, Fodera, they got their names because of the quality of their work with wood, and not because of the quality of the original planks of wood instead.