First, some university teachers are very busy every day, but some people find that they don't have much time to make up lessons at school every day. They are busier with their own projects, because we know that university teachers need to be busy applying for scientific research projects, and some scientific research results are limited by time, so they are under great pressure and have their own tasks to complete. In addition, as a university teacher, I will also participate in writing papers and have certain requirements. And some teachers will also take part in teaching graduate students or doctoral students. Judging from the work content, they are really busy and time is tight, but this cannot be used as a reasonable reason for them not to teach students. Since you are a university teacher, you should do your job well. As university teachers, they only consider their own projects and are not very professional.
Second: In addition, some university teachers will arrange their own tasks reasonably, be able to complete their own teaching tasks, and better arrange their own time, which shows that he can wear several hats and do his own job well, even if he needs to do research on scientific research projects, he will complete the basic class content. But for some university teachers who never teach and are busy completing their own projects, in order to complete their tasks and not be criticized by others, they will not attend classes as a result. As a university teacher, it is originally a role of preaching and teaching. If this role is not done well, how can we be sure that he can do scientific research projects better?
Moreover, the behavior of university teachers not attending classes can easily lead to students' deviation. Students mistakenly think that it is easy to be a university teacher and there is no need to substitute. This in itself is easy to misunderstand the profession of university teachers. Therefore, no matter from which point of view, this problem is unreasonable, and there is no legitimate reason to explain that this is the right behavior.