I don't know. I can only speculate. Maybe we are that adverse to conflict that if we can handle it ourselves and not violating our core values then we will bottle things up and run away
But if there's no place i can run away to or if i am being accused of something very serious then i blow up
I remember when my cousin's wallet was lost and she accused me of stealing it from her dresser i really blew uo and became violent. So unlike me. I tore her blouse apart jn my anger. My mom was shocked. It was the firdt time i got that angry and the first time my mom saw me angry. In fact no one knew i can be that angry. They always thought i can put up with anything. I didnt talk to my cousin. We live together that time with my mom and i didn't even want to see her. Well she apologized after a few weeks when she found her wallet deeply burried in her closet. I accepted the apology.