What is the purpose of the wrists above the car door?

Surprising tests to validate their effectiveness
To demonstrate the utility of these handles, Jared Glaspell, an engineer at Ford Motor Company, performed some amazing tests. He simulated the experience of a pregnant woman using a fake belly to observe how these handles facilitate the entry and exit of the vehicle. The results confirmed their absolute necessity, proving that these automotive design elements are not mere accessories, but practical and thoughtful devices.
Multi-purpose and ingenious use

In addition to helping to get on or off the vehicle, these handles can also be used in other situations:

Hang light objects, such as clothing hangers on long journeys.
Provide additional support to passengers on rough or winding roads.
Help children to stabilize when they get into the vehicle.
These handles therefore play a discreet but essential role for passenger comfort and safety.