I don't really think so.
Like I said, you statements are more opinion....not based on any fact at all. Some have a problem with that.
In captivity, snakes of a particular age vary greatly in weight and length. That is fact. They do so in the wild too. Weight per age or growth rate is dependant on various environmental factors and genetics.
Some breeder feed smaller meals with the intent of properly supporting the animals until sale. Some breeders feed more than necessary to support the animal to grow it faster. Some people feed in a random manner.
That is just the way it is.....it is the people that don't feed enough to support the snake that I have problems with....
so if someone is selling snakes that look emaciated........then I could see complaining about snakes being underfed. But with just a weight and age....I wouldn't worry about it.