Too strong cabin is not good because it will absorb the impact energy worst and it will transition the impact energy to your body better so less harm to the cabin means more harm to your body.
Same thing is applicable for motorcycle helmets. Motorcycle helmet should not be too strong otherwise it will not be able to absorb the energy and will transition most of this energy directly to your head.
Tp may not understand or be able to discuss the different definitions of "strong" here.
So I'll assume he accidentally tried to make a good point that's confused and not applicable here. Instead of trying to break down his garbled series of errors. ( his Autotroll version may need updating )
I'm impressed by the Tesla structure and ability to maintain the cabin space. That's really important. Volvo sold a lotta cars with ads showing a strong roof!
Modern paraglider harnesses may have air bags under the seat to absorb impact forces to protect the spine. First, (in time, not priority!) by offering a surface to skid on, reducing the G load of a sudden stop. Second to disperse vertical loads.
It's a very complex engineering and human body mechanics field of study.