First of all, aviation has vastly more stringent oversight than cars do, in terms of manufacturing regulations, maintenance regulations, and pilot regulations.

This fact is so underrated... They do pre-flight checks and frequent maintenance, let alone requiring extensive testing and redundancy

The second question I struggle to get past... Why is this, in any way, better? In a 747, I doubt a pilots strength could control the aircraft, even if everything linking the steering column was strong enough to handle the forces directly. In a truck, the driver's strength could still steer... So what advantages are there to steering by wire? I've never heard an answer, and I'd love to hear any