You can never really start from scratch, neither with wine nor with violins. There are centuries of traditions and knowledge accumulated that you have to draw upon, to reach a really high level in the finished product. But if we start with the raw material, it still has been growing for years before you can harvest - the vines will have grown for 4 or 5 years before you get a decent harvest...

 and the wood for violins may have grown for 150 years or more before the trees are felled.

The best wines and the best violins come from carefully selected raw material, Hand split spruce, gently dried for years...hand picked grapes, carefully transported to the winery and immediately chucked into the fermentation tank.
Noble raw material can be turned into something divine, by people who put a lot of passion, knowledge and care into their work.  Sweat and swearwords too, to be honest. But I think both luthiers and winemakers are often really dedicated to their work, never giving up until they get the result they 're looking for.