Yes -- not only the personal reality of Maria von Trapp, but the reality the Christian anthropology has taught for two thousand years. The musical is one of the long line of modern romantic fiction products that put people in top physical shape driven by frivolity as a model of love.
Which is why I like the recent mini-series on John Adams. The leads are both good looking people, but apparently have no professional vanity. The love displayed by each toward the other is palpable, as is the mutual respect. As an aside, the actor who plays Jefferson in this film comes very close to the Jefferson I have always imagined: the shyness, the hesitancy of speech matched with fluency in conversation, the mixture of candor and deception.