I think the main point was the demonstrate how out of whack serving sizes have gotten. But from how you described it, it does look like what he did was way out of line.
No the main point was to make money. Sure the serving sizes can be large, IF you say yes all the time, and also IF you’re not getting any exercise. It’s like when Atkins became popular and suddenly everybody decided carbs were “unhealthy”, I remember a coworker of mine being shocked at how many carbs were in trail mix, “shouldn’t trail mix be healthy?” And I had to explain there’s nothing unhealthy about carbs if you’re on a hiking trail and going to be walking for the next hours. Carbs are energy, if you’re going to use them they’re fine. There’s nothing really wrong with having a quarter pounder and supersized fries if you’re going back to your construction job where you burn 500 calories an hour.
He junk scienced it.