I'm exceptionally tall, 6'7" and the first time I was dragged to an amusement park and challenged to ride a fairly extreme coaster first thing, it hurt my neck. Something about the way the shoulder harness latched down, the centrifugal force pressed my head over it in a way that left it unsupported. After I got off the ride, I got myself a pamphlet about ride safety and discovered that the rides have a maximum height that apparently the ride operators don't think about nearly as much as the minimum height, probably because people who don't meet the minimum height are likely to be kids who aren't responsible for themselves - and I had to be responsible for myself and think twice about riding some of the rides that were only rated for two or three inches less.
Now, if I were Shaquille O'Neal or something and obviously over 7 feet tall, it might perhaps inspire a ride operator to double check his safety chart - and a mature adult who knows they're over 7 feet tall might be expected to take some responsibility on their own. It's easier to talk about height than it is to talk about girth, but the exact same principle applies. In this case we have the unfortunate combination of ride operators being lax with their safety checking and a kid who looked like an adult, who the people around most likely assumed was responsible enough for his own safety.
While the ride may have had some questionable design decisions if subjected to the "monkey test", we wouldn't really have amusement parks or a lot of other fun things if that was the guideline we used to determine what's allowed to exist. From my perspective, the fault here rests entirely on the ride operators and I think it's a shame that it's being demolished.