This topic needs to be answered from two aspects. As our current medical institutions level delineation, the three hospitals already belong to the first-class hospitals, the level of facilities, medical technology, especially the team of experts are absolutely top, which also directly requires the doctor's own ability to quality must be excellent, can be said to objectively raise the threshold of entry. On the other hand, from the perspective of the overall quality of practitioners in the entire healthcare system, higher and higher education is also a major development trend, so this phenomenon is also very normal!
I hope the answer can help you, please adopt!