or shall we say "yeah but what if they failed too?"
Sir, I admire your stout attempts to defend the indefensible.
Shall we say "Cascading failure"? Or perhaps "Avalanche effect"
It's already established that a faulty battery can "lock-in" and create mayhem with the theoretical redundancy-layers. Add to that, the deafening silence about the pyrotechnic control-panels.......
THE EMPEROR'S GOT NO CLOTHES!!!!!