“The wand chooses the wizard… it’s not always clear why.”
I always imagined that all wands looked roughly the same, maybe slightly different colors, but certainly not all those different, carefully constructed, unique, designs. I think of them as more utilitarian. Though I see the appeal of a unique design for every witch and wizard, it seems impractical, especially since they only cost seven galleons and a unicorn hair can cost up to 10 galleons. It doesn’t seem to be good business for Ollivander.