If a news organization publishes an article welcoming someone onboard, they should also do that when someone is fired because of a scandal.
Of course, if someone leaves because of personal reasons or jumping ship, there is no reason to do that. But this is different.
The complications of HR policy and law do not allow for your proposed solution.
Sorta. Usually they would do a press release or a post on their company blog - not an article.
Aside, posting about a new hire is easy and has no legal livability. Posting on a departure can be a tangled web.
I do agree that some note by Ars would be good here.