I have not studied the Brock Turner case in any detail. However, I know there are some disturbing questions about what actually occurred. I think that there was a massive media campaign against him before and during the trial that makes me doubt that he did get a fair trial.
I agree that he did get an extraordinarily heavy sentence in being required to register as a sex offender for the rest of his life, but I would not say this was any kind of model for justice.
Here is a relevant article – https://www.theodysseyonline.com/3-reasons-brock-turner-shouldnt-jail.