Never said otherwise. However, if the perp is dead, that means that (a) nobody can defend against the allegation; and (b) there is no guilty perpetrator to punish.
And likely they served only briefly cause word of what they were doing got out and they were protected by being moved around, which is the real atrocity in the whole issue.
That's not the case in every situation. Read the article. A priest who spent a few weeks as a vacation substitute in a parish in Illinois, then returned to his usual domicile in Iowa, where he later molested, is counted as an Illinois abuser. That seems to me to muddy the waters.
Nobody is claiming "it wasn't so bad". But being imprecise and deliberately inflammatory and exaggerated, like this report, doesn't really help.
How would you know? The CC refuses to cooperate and release secret files.