This is because people receive a variety of education, including schools, as well as parents, elders and friends, which are influenced by various aspects, so people's ideas are different. Even if they have the same idea, people's understanding is different. Some people think this is important and attach more importance to it, while others think other things are important. Moreover, people nowadays also have some rebellious mentality in their work, and feel that there is no need to imitate the same behavior of others. It's a small matter anyway. I always feel that others will not care. Or I don't like to restrain myself, but I like my freedom and ignore the freedom of others. It is also possible that they didn't mean it, but just ignored the feelings of others.

Hope to adopt, you can ask questions again.