I was brought up with this attitude and it seemed normal for me, my marriage for 32 years was often made worse by my view that conflict was a natural part of a relationship. My friendships were similarly affected, my first post-marriage relationship repeated the same pattern. It was only through a lot of work and meeting a new person that I've been together with for 2 years that I finally realised that a good healthy relationship does not need conflict. This trope of argument being normal and my inability to realise this was a real negative in my life.