[dafoex]

We are but muggles, so I don't think we need to worry about teleporting children appearing in the time it takes you to get back in the car. You know your blind spot is clear and can see where your future blind spot is now.

[chrisseaton]

This is like arguing against seat-belts because you think you can brace yourself sufficiently.

[throwaway0a5e]

Seat-belts are have basically no downsides. Backup cameras trade back over accidents for accidents involving cross traffic.