Why?
Because the charts don't tell you how an arrow performs in the real world with regards to shaft-to-shaft consistency, actual durability, and product manufacturing quality.

Anyone can read a chart and pick a shaft, and every maker will tell you theirs is the best. Forums are where people come to find out people's real experience with the products.

Thank you for your effort and your time.
I'm no longer interested in the opinions if you have not personally used those shafts.