It may be an incorrect interpretation, but I think it has more meaning than what it seems to be seen as.
That is exactly how I see it. You cannot truly know you love someone if you do not know all of who they are, both the good and the bad, the likes and dislikes. There is no way one can know that upon a meeting, a look. There is beauty beneath the surface that people often do not see because they obsess on the outside appearances alone.