well I just think it's dumb that it's SO important to them, so you get it, and then something happens over 400 years that either made them abandon their "worship" of it... they needed something right in the middle to have perfect symmetry, so maybe the gale nut tree in the present time fufills that role. question is... did it grow FROM the tuni nut, or is it something else? and if so, what made them abandon their beloved tuni nut?
Maybe this goes in Zelda theorizing section?
or maybe it's irrelevent
still... makes me wonder