Some other comments have posted about the laser safety being the issue but I have a more physical story:

Recently got a Waymo for the first time to take my kids and I from one hotel to another in Phoenix.

- Car pulls up

- I walk up to the trunk as I have a suitcase

- Out of habit, I go to open the trunk by pressing the button under the "handle" (didn't realize you have to unlock the car via the app first)

- My hand moves by the rear trunk laser that is spinning and "whacks" my hand.

Not a big deal but seems like an interesting design choice to place a motorized spinning device right next to where people are going to be reaching to open the trunk.