I can see it to even out the color of the walnut.
I have a thing for the natural tones of some woods. When I see them covered up, it hurts my soul. In my mind, I think "Why would you choose that beautiful of a wood if you just wanted to cover it all up?" It doesn't make a lot of sense to me.
You're right though - it's the way you want it, and that's good enough. I don't have to like it. We all have different aesthetic sensibilities, and yours is not mine.