I love these wildly over-the-top exaggerations.
When was the last bridge you saw without a barrier to prevent going off the edge?
What makes you think a vehicle vision system will handle "blinded by sun" any worse than humans already do?
Remember it's projecting and predicting the road ahead, even around corners and in the dark - so being blinded by the sun isn't going to cause it to swerve wildly off course and off the bridge - it can continue to use the data it had before being blinded (just as you do).
Also remember it has eight cameras it uses for this. The 16 year old new driver texting and talking to friends coming towards you at 60mph has two.