This and https://en.wikipedia.org/wiki/Paris_syndrome make me feel like Japanese culture has somehow induced a unique kind of coddling within their population. People there seem to build up severely idealized views on many different things, to which the real-world equivalents can never live up; and then they are then either repeatedly disappointed/frustrated/disgusted by reality, or they refuse to engage with the rea…
Regarding the issue with idols needing to conceal their relationships, you need to keep in mind that the whole "idol" industry basically caters to the Japanese equivalent of "incels" - men who have trouble socializing and who are often emotionally underdeveloped - not the broader Japanese population. I've seen similar unrealistic expectations and coddled behavior from subcultures in the US, such as gamers. (To be clear - I'm not criticizing all gamers here, just certain controversies within the subculture that have gained media attention in recent years).