I think it is because the Ba’al Simcha gets all the leftovers, and any good food in the Mens section is bound to be polished off before you even start. So the eitzah is – put all the good food in the ladies section, where they are all either dieting or pretending to diet, and therefore creating a lot of leftovers!
Another possible pshat – the father says that just put out some coke, crisps and some herring & kichels; the mother wants something more fancy. So they do a pshara…