Why are there more and more primary and secondary school teachers with low academic qualifications and non-normal majors?

In fact, teaching is an art. To be a good teacher, you must have some knowledge, and you need more responsibility, love and confidence. The times have changed again, and you need to keep learning, so that your knowledge is no longer aging, and it has nothing to do with whether you graduated from normal school or not. Even normal graduates will be misled by others and eliminated by society if they don't make progress in a few years.