since most of the defamed are public figures or celebrities, defamation suits are a waste of time and money. But that doesn't change the fact that the first amendment applies to all of us individually and as members of any group or business.
there is a higher standard for public figures. but they can't knowingly lie about them or that is evidence of malice.
your problem is you can't stand when anyone with an R after their name is held accountable. people who are actually defamed do NOT consider the suits a waste of time and money, donald clearly likes suing people even for no reason and if the things posted about him were defamatory, don't you think he'd sue? heck, he sued bill maher over a joke he told.
as for roy moore, his lawyers threatened to bring a defamation suit. they were soundly slapped down by an attorney who told him he'd seek rule 11 sanctions if such a suit were brought and then told him that moore had better preserve all writings and other possible evidence that would come to bear in a defamation case or they'd seek sanctions for spoliation.