Actually,it might be more than enough. FAA reliability req’t for critical to flight parts demands 10 to the minus 9 reliability ( helicopters ). Not a lawyer,but this would be a point of departure. It depends,though, on the design point of the system. In this case the poster Susie is writing that essentially the force was too high to turn the wheel. If the Subaru defense would be that the driver didn’t try hard enough, the counterpoint would be to ask where, in the owners manual, it describes how much force is required to accomplish this difficult task. There is nothing in my 2019 ( pages 318-9 ) manual that addresses the driver corrective action for this single failure mode.