The bars are not for vehicle impacts...they are there to keep collisions with brush and some animals from creating vehicle killing damage. Hitting a kangaroo, a deer, a dog....brushy, grassy, tree limb encroached trails, etc. Looks like the Grenadier was going a bit faster and slammed on breaks and the nose dive caused the bar and bumper to hit the Tesla like that. I dont put guards over tail lights as they are truly force multipliers.
I have had brush bars both add on and integrated into full blown front bumpers on a couple different vehicles. Fully welded as integral unit is best.... Ineos never said that a bolt on was stronger than a full system like ARB, Demello Offroad, Expedition One, Ironman Offroad, etc.....
Never seen factory option that was MORE robust than an aftermarket version.....no matter if rock sliders, front bumpers, rear bumpers, roof racks, etc.
The same people worried about third tailights in rear, air bag operation with front impact or side impact while using heavy duty bumpers and sliders.....are the same ones that are the reason the OEM offerings and bolt on offerings are not as tough as what some want. The nannies are at fault...LOL