I don't remember well, so correct me if I am wrong.
All of this secrecy about their relationship is to placate the toxic idol industry's dumb no relationship rules right?
She's not an idol so there's no hard rules on her dating, buuuut she's keeping her options open on her career track (acting, model, idol), plus her recent upsurge of fame, so they're trying to keep anything that could be used against her on the down low. But in essence you're right, it is the industry and fandom's fault, burn them all to hell.