Same reason that we publish the names of people arrested for crimes before they’re convicted.
It’s not about one specific case, it’s the fact that our justice is done out in the open so we can’t just make people disappear and have no paper trail showing what happened.
If we didn’t have a trail of documents somewhere that can be inspected to show exactly how a person ended up in jail, then we could just lock them up and say “trust us, we did everything right.”
Sure, in some situations (especially arresting innocent people, where just the record of the arrest can ruin their lives) it sucks, but if it was all done in secret, it would suck so much more for many more people.