I would say that they definitely train harder than people who take it semi-seriously. Their training looked on par, from what the video shows and tells us, of a very dedicated lifter.
Supersetting upper body workouts with sprints to failure is not something that someone who is “semi-serious” could do. Before I herniated my disc I was training pretty hard and had my lifts at 315 for max bench, 355lbs for my 15 rep sets on the squat, bent over rows maxed with good form at 245, doing 3 sets of supersetted uphill litvisprints once-twice a week, etc. - and this workout is definitely something that would tax my system heavily. It also looks like they do a lot of work on the rings, and anything done on the rings is pretty much 5x harder than that equivalent exercise done off the rings (besides maybe pullups).
Also, I could be wrong but it seems that you were bashing them in the sense that crossfit = small weaklings, which may or may not be true - I’ve never done any of their stuff. However, I’d like to see everyone on this site try to go do sets of weighted ring dips, or iron cross pullouts after getting all of the blood in their lungs from sprints, and making your upper body feel like it’s working out at near-failure already.
Not to mention, I would find it hard to believe that anyone on this site could claim that the bodies of the 300 actors are not hella impressive.