I guess there's an argument that can be made for both sides. But in a typical 20-30 mph crash a rollbar would definitely increase the likely hood of injuries to yourself and your passengers. I personally would never install one in a street vehicle for that reason.
Just my 2 cents.
Not sure I follow your logic there rmk. If you notice, the there is literally no "Bronco" left above the bed rail level. No hard top for it's minimal protection, and no windshield frame which is zero protection anyway. Even if you just flipped the truck over on it's top by hand, the windshield frame would fold under the weight.
It's all cage holding their heads off the pavement.
Yes, they definitely got banged up, and probably got a cracked head or three on the bars, but they would likely be scraping their bodies up off the pavement had the bar not been there to keep them off the ground. Not sure, but the rear seat passengers would probably have fared worse than the front, as they're sitting higher in relation to the bed rail.
We see in the pic that they did have full harnesses in the rig, but no telling if they were using them or not at this point. Maybe the harnesses helped, or maybe they kept them from being able to stay out of harms way too. More likely they helped at least a little.
And while the harnesses would not have let them duck for cover (if that was ever an option anyway) between the seats, the harness would not have been there had the cage not been there to mount them to.
Actually I do see your logic. Just not sure I agree with it.
Paul