You can read all the facts of the case and draw your own conclusions. But the bottom line, is the sentence isn’t about just a few of the facts of a case- it is about all of them.
This young adult clearly was in a different place emotionally (maturity) than most 18 year olds. But that is just one of the multitude of facts that have to be weighed.
You think this guy should get the same penalty as the dad that pedals the same kind of images of his minor daughter?