This is what he does. He immediately went to say "Seems that's all you pro parsing people can ever resort to." which falls into the "You guys never get what I say anyway" type of stuff he always bring sup when you corner him with a good argument.
That's not always the problem though. For example, when you're tackling turn 8 or 9 everyone in your party may look to be doing pretty well based on your hate meters. The tanks outstripping everyone nicely so they are holding hate fine, and everyone in the party is right in line with one another (exceptions going to hate reduction moves), but in the end you just aren't even coming close to the DPS check of the fight. The team sits stumped. Wondering "Why can't we beat this? Everyone's hate meters seem to be properly in line!" but once a parser gets thrown at the battle it becomes clear. Everyone in the group is equally below the thresholds required to win the battle. Everyone needs to step it up because no one is succeeding.
See the entire "threat meter" argument assumes that if you are all equal then you're all doing alright, but that's a flaw. It only works when at least 1 person is absolutely killing damage so that everyone else has a baseline amount of threat to strive for. When you all fail the entire system falls completely apart. It is a flawed method. Perfectly fine for low end content, but completely useless for end game content.