Some journalists appear to be really mixing up civil cases and criminal trials.
Dominion was seeking compensation for the harm caused to it by Fox. It won a settlement because it could prove that harm.
Dominion is not working on behalf of the public.
It doesn’t owe the public anything, and certainly not the cost (financial, resource time, reputational, and otherwise) of going through a trial.
It’s not their job or burden to “expose” Fox and save the Republic.
That’s on Americans.