Just a thought on the matter-- the adjustment on both the front and rear sights allow for more extreme windage adjustments.
The adjustments on the front sight are used as well with rear tang sights that have NO windage adjustment. Finally, some shooters prefer to adjust the front sight to leave the rear sight in the same position in regard to the face to stock relationship.
Personally, I do not use them, but, several shooters do, and do well with them. There is a learning curve with any rifle and set of sights.