I think this phenomenon is largely a matter of ideas and habits. The traditional costumes of Japan or North Korea and South Korea are not only traditional, but also have been preserved to this day, and they are used to nature. Because they never stop, careful observation of modern kimono is no longer a narrow traditional dress. Although the basic shape is traditional, the elements inside have begun to diversify, so that kimono is not only a traditional dress, but also a dress with modern flavor, which is also due to the natural expression of kimono today.
Our Hanfu has been artificially cut off for hundreds of years, resulting in the lack of the concept of "Hanfu" in later life, which eventually became a habit, leading to the idea of treating it only as an ancient costume, that is, the costume of the ancients. This is very different from the concept of Japanese kimono. The state of kimono is a traditional dress in modern state, which shows nature in modern society and does not conflict with modern living habits. However, our Han costumes are still "ancient costumes" in many people's minds, and many of them have great conflicts with modern society and are unnatural.