I don’t understand the idols world. Same for the fans.

what part do you not get, a vague comment like this is hard to reply to

The fact that he always has to be in shape, the fact that he can't have a bad day. Having a concept that appeals to fans. The fact that he can't be pissed off, just at home.
All the product he represents as a flawless person.
I'm puzzled by this last chapter. I'm not a fan of anyone, so idol work baffles me and so does fan expectation.
But I like the main character because it's a change from other series.

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