However, Johnson seems to assert that this head-butting was no different than the conflict experienced on any other film set, and the conflict didn’t define their working relationship.
In fact, upon initially reading the script for the film, Hamill even admitted that he was “appalled” by Episode VIII’s direction.
Johnson and Hamill simply both understood the weight of bringing this character back for one more adventure.
If you have read about Mark Hamill’s thoughts and feelings towards Star Wars: The Last Jedi, then you likely already know what Rian Johnson is referring to here.