It has to do with the fact that Ford, for all his greatness, is an Irish egomaniac, as anyone who knows him will say.
“I think maybe when you live with someone who is really very ill for a long time, it somehow gives you more of a greedy appetite for life and maybe, yes, you are less measured in your behaviour than you would otherwise be.”
“I regret not doing a film that I was offered with Clark Gable because the script was not good enough.”