[bryanlarsen]

Humans do it with variable focus vision. The Tesla cameras are permanently focused at infinity.

[cma]

For seeing rain it's mostly that they are offset back from the windshield more. People over 50 barely have variable focus vision and it isn't really important in driving.

[nradov]

Normal human eyes also have more dynamic range than the cheap cameras used in Teslas. This matters in some difficult lighting conditions.