Netherite Hoes does the same damage as the Diamond ones

Every netherite tool does 1 more damage then its diamond counterparts.

Diamond Sword = 7, Netherite Sword = 8

Diamond Axe = 9, Netherite Axe = 10

Diamond Pickaxe = 5, Netherite Pickaxe = 6

Diamond Shovel = 5.5, Netherite Shovel = 6.5

Diamond Hoe = 4, Netherite Hoe = 4

 

Why?

...why?