It's hilarious because of Simula's size compared to the rest, and because it doesn't include Apple/Valve, and really, only those two should even be on the list at all! They literally subpoenaed everyone except their real potential competition. I get it, they subpoenaed whoever they could. I think the FTC in the Bloomberg story linked in the post said it best: "It reflects their scorched-earth defense strategy here to fight in whatever manner is available to them"
There isn't anyone with a current model headset like the Quest, that is even remotely close in market share in the US.