
My experience on this subjust does not come from Pituophis, but mostly True RedTail Boas and other herps.
Reptiles love to eat and grow. Part of this strong feeding response is due to the fact the in the wild, if they do not put on enough weight before winter, they will die. So you have a snake that is gaining extra weight. They store this for winter. When they do not have winter, they continually put on addition weight and it is never lost.
Muscle tone is key to the health of animals, I have noticed much better muscle tone in animals that are properly cycled. It keeps them fit and in shape. The winter "stress" is a way of life to wild snakes.
I cool all of my snakes, from yearlings up. I do not care if the snake is breeding or not. It helps them grow properly. Many breeders of true redtails boas consider it a must do.
When breeding panther chameleons, if you do not cool the females after egg laying, they will start producing another clutch, dispite their body not being able to handle it.
Sorry for the rant. I am not saying there is a right or wrong way. It is more a theory in the proper husbandry of animals. I have learned over the years this is key. A snake that is not cooled is feeding for an additional 2-3(plus) months out of the year, a normal specimen would not. I have noticed healthier animals in the long run.
Also, you do not have to cool as dramatically if you are not breeding. They key is to slow their matabolism, get them off feed, and let them rest up.
Hope this answers your question