The monks appear to use this eating pattern mostly to fit their meditation schedule and not annoy the people giving them food ( http://www.vipassanaforum.net/forum/index.php?topic=1993.0 ), but there seems to be some evidence that skipping dinner is more healthy than breakfast ( https://www.hsph.harvard.edu/news/features/skipping-breakfas... ).
I don't know if it is enough to balance the social aspects.