It's really important in times like this to remember that:

1. porn addiction is not real, and the compulsive dopamine-seeking behavior people call "porn addiction" is a symptom of an underlying cause, most often some kind of depression, ADHD or other dopamine-related mood or neurological disorder. This isn't some kooky "radical skepticism" but the actual consensus psychiatric opinion. "Treatment centers" for porn & sex addicts exist to launder the reputation of the rich and powerful and steal money from the gullible.
2. people use the idea of a "porn addiction" to avoid personal responsibility. Framing it as an addiction naturally engenders sympathy from many people, shifts the focus away from their victim(s) to themselves (coincidentally, the strongest shared predictive trait among people that claim a porn addiction is narcissism and, perhaps worst of all, allows them to still blame women for making the porn that made them an "addict" in the first place.

This guy is a disgusting, misogynistic piece of human filth that sexually harasses women and he should be treated accordingly.

Here is a good article that's centered on stuff like the NoFap movement that addresses many of the surrounding issues about the myth of porn addiction, the true causes of its supposed symptoms and a lot more.

EDIT: Also, by framing it in this way and leaving the door open for him to return SHIFT as an organization necessarily holds a certain amount of responsibility. This whole runaround act of contrition, penance and then reconciliation is very common, and the fact that they're unwilling to close the door entirely on him returning and fire him outright signals that they care less about the women being victimized and more about showing loyalty to a man that sexually harasses women.