I don’t know if anyone is aware of it, but those “lousy, plastic pins” are not employed to prevent gimbal separation during a crash. They are present to assure the gimbal does not detach from the mount during normal flight. In that they are extremely effective and more than adequate for the intended purpose.
We can employ other methods to assure the camera does not separate during a crash but in doubt so we assure the forces induced during a crash are transferred to components further up the line from the camera and gimbal which will be more difficult and expensive to repair.
We can’t make things crash proof...