Christ, we are told, gave Himself up so that His bride would be set apart, made perfectly clean (as 1 John 1:9 puts it, cleansed from all unrighteousness, which leaves her righteous), glorious, spotless, youthfully beautiful, pure, and perfect.
He did it all for His bride. He did it for her benefit so that she would be all that she was designed by God to be.
I bet there isn’t a husband here who doesn’t want that for his wife. I bet there isn’t a wife here who doesn’t want that for her husband. And that is the point of submission.