Yes, it definitely speaks of two people who care not about looks. I am also sure the situation feeds insecurity, for small that it may be. Either way, the point here is that we all know that most likely this JW couples are less likely to be with each other because of real feelings and more likely because of the influence of the org on where to look for partners. Not denying that true love does happen in this way. We are just talking probabilities.
In my opinion, we evolved to look for beauty in every aspect. Is a survival mechanism. It is well know that, for example, certain silent diseases (like liver and other intestinal and hormonal issues) can reflect in the skin and the overall appearance of a person. In evolutionary terms, we would be programmed to look for the healthiest and strongest mate available thru their outside appearance. Once we poor love into the equation, then having a friendly relationship with someone we are not attracted to, can lead to further involvement, thus confirming that we can not love what we don't know. It is my opinion as well that we could potentially fall in love with anyone, if given enough time to get to know them. Is just that we do not give ourselves that chance, we just tend to follow beauty.