Yeah, Dude, backing does serve other purposes.
If you just loaded the line onto your reel, you may have quite a bit of empty space between the point where the line-wraps stop and the edge of the spool. Then when you strip off line to cast, the amount of line that remains on the reel will be creating a very small "effective diameter" of the reel's spool. That will make winding up the line slower than it would be if that "ed' was larger. It will also create larger loops in your line while that is on the reel, making them easier to shake out for initial casts than if the loops were tighter. And there are some other mystical factors involved. In all cases, backing will create more "ed" on your reel.
And that is 100% good! Use it! Even if you never see it again after you load it onto the reel, it's working for you.
Pete