There are many parts of Japanese culture that is seen as desirable and aspirational to others. The sense of social cohesion and politeness that is projected is seen as a good thing. Yes, the reality is more rough than is projected, Japan has its issues just like everywhere else. But when looking in from the outside, there are a lot of things that can be seen as goals for others to achieve.
This is the same reason why we are seeing a lot more positive takes on China nowadays. The image of a society that is progressing in a way considered desirable. It grabs folks attention, there is also the novelty of it all as it these of nations that look similar but different.
To steal and paraphrase "the important thing about fiction isn't that you see that dragons exist, it's that you learn that they can be defeated".
Of course trying to emulate something you think is desirable based on false pretenses is its own problem, but that gets complicated.