I just posted the video of the show.

Good question. My reasoned guess: some butterflies – swallowtails, for instance – may come and feed on the nectar of the flowers, then later lay eggs on your citrus; however, adding more species of pollinator plants also attracts caterpillar predators. Also, many caterpillars are quite specific in what they eat. Moths/butterflies find their host plants via their excellent sense of smell. I'd wager that adding lots of flowers might confuse them more than if you had a host plant sitting all alone in the middle of a lawn.

We have a lot of pollinator plants in the food forest and have less trouble with caterpillars devouring our trees than we did before I planted the flowers. Just an non-scientific observation.