Since I maintain that the definition is harm to reputation, and you've given two examples which trivially involve harm to reputation, you haven't made your case

Since I maintain that the definition is harm to reputation, and you've given two examples which trivially involve harm to reputation, you haven't made your case. Spurious copyright strikes are just an attack on income, no different from a DDOS, ransomware, or running up a bunch of spurious purchases, in anything but the mechanism (in this case providing fraudulent information). That's extortion.