I skimmed it and disagreed with it. Generally, if you can't win an argument based on logic, and then emotional appeals, then you can fall back on jurisdiction. You can attack the other person's credibility (you have no jurisdiction), proclaim that no resolution is possible, the world is too complex (we don't have jurisdiction), or as I now realize whataboutism means this is the right jurisdiction, but nothing you said matters because we're arguing the wrong topic. So yeah, whataboutism is the argument of last resort. Ergo, the one used by people who don't have a good argument.