Sometimes perspective is everything, isn’t it?
Take marriage as an example. It’s easy for husbands and wives to fixate on their differences, maybe because those differences can easily become the source of marital conflict.
From there, it’s only a short leap for a spouse to think that their way of doing things is better, or their thinking is superior.
It’s like a story I heard once of an English professor who wrote a simple sentence on the classroom board for his students to punctuate.