Good Day ngureco
Maybe the whole family should mimic him until he can't stand it anymore, breaks, and actually laughs. Maybe he doesn't realize how he comes across to people. On a more serious note, perhaps he feels that he has to be that way for some reason. Does he have reason to believe that he is the only one keeping the whole set up together? Does he have any reason to believe he is like Atlas with the weight of the world on his shoulders?
Maybe he would like to be another way, but feels that he cannot. Maybe he feels that he cannot afford to make any mistakes. I'm reminded of a line I heard in the classic movie adapted from the classic movie, The Godfather.
At this time old man Vito Corleone (Marlon Brando) is sitting in his garden with his son Michael (Al Pacino). Michael is now the godfather with Vito in semi-retirement. This is the scene when The Godfather gave Michael his thoughts or profile, if you will, of who the family traitor must be. "Whoever arranges this meeting with Barzini is the traitor."
Anyway, another line old Vito tells Michael is: "Women and children can be careless. Men cannot be careless."
An old fashioned sentiment, no doubt. But is there something about this particular family dynamic that makes the man in question cleave to it?