I could see differences due to materials. Wood is not uniform product, so picking the right section for right part might do something minor. Metal is metal and

I could see differences due to materials. Wood is not uniform product, so picking the right section for right part might do something minor. Metal is metal and we get very exact and uniform properties with modern manufacturing. Now maybe we could question why have we not come up with anything better for these wood instruments? Like some mixture of plastic?