Well, also look closely at the most common failure modes for a front fork: (1) the handle bars wiggle out of alignment, which still allows you to brake and stop safely; (2) the axle nuts are loose, in which case you probably won't even notice unless you hit a bump, as the dropouts for removing the front wheel point toward the ground; (3) the steering locks in a particular direction, in which case you still can brake safely and stop. Catastrophic failure of the welds or metal itself is extremely rare, without some advance warning like wobbling or creaking.
To my knowledge, no commonly sold cars are exclusively drive-by-wire for the braking system. If you lose all control in a car, you can turn off the ignition and forceful application of the brakes allows you to stop, even if you lose the power assistance.
By contrast, the most common failure mode for a drone in the air is... it falls out of the sky. That's pretty much the long and the short of it. There is good reason that flying objects should be held to a higher standard of safety.
To my knowledge, no commonly sold cars are exclusively drive-by-wire for the braking system. If you lose all control in a car, you can turn off the ignition and forceful application of the brakes allows you to stop, even if you lose the power assistance.
By contrast, the most common failure mode for a drone in the air is... it falls out of the sky. That's pretty much the long and the short of it. There is good reason that flying objects should be held to a higher standard of safety.