As I read it, taking additional hold fuel would (may) have put them over hence not being able to hold long enough to get in.
No need to yell...perhaps less axe grinding. He even said he was speculating.
There are NO pillars of virtue in the business.
You don't plan a flight to carry so much fuel that you're too heave to land at your destination unless you plan on holding until you burn off enough fuel to allow you to land. Which begs the question why you would do it in the first place. If you're looking for a weather change, delay the flight on the ground until it will have you arrive after the forecasted change is likely to have occurred.