Parsing words here but “intended” does not mean that they must be done that way. If the adaptation you’re looking for with these workouts is maximum oxygen uptake, you’re looking to shift as much burden to aerobic energy systems as possible. Higher force efforts are more glycolytic, so a higher cadence reduces the force requirement and shifts burden over to aerobic systems. This is common text throughout Chad’s VO2max workouts.
I don’t have time to provide studies right now, but this is in line with what I’ve always read/heard. It’s not a necessity, nor is this to say you must pedal at higher cadence always, as there are studies that show lower cadences are more efficient on long rides within reason, but my understanding has always been higher cadence-> more aerobic → higher O2 uptake, increased lactate production, less glycolitic ATP production, which is a primary goal of VO2max work. If you want to increase muscular ability to produce higher torque, then a lower cadence is advisable.
Perhaps your point of contention is with my 100s comment specifically, and that’s fair… really anything that is a high but controllable cadence for an individual will suffice. For me, that’s typically 107-110, but I normally ride around 100. If you’re a guy that rides at 80, 90 might be good.