In husbandry-related debates such as this, it is useful to consider the animal's habits in the wild. And I assure you, no snake would find food every 2 days in the wild; they are equipped to go over 12mo without food, in case they are forced to.

Overfeeding is unnatural. Their bodies are not meant to handle such great food intakes. Personally, I believe adults should be fed no more than every 7-10 days.