Unfortunately there will always be incentive for companies to give idols fake personas and for idols to not reveal who they truly are. I'm very careful about which idols I stan these days due to these kinds of issues, and if I even get a whiff of overt fakery, not worth the effort. I just hope that his victim has a good support system and has people looking out for and protecting her, because the justice system there obviously isn't doing so.
The part I find really egregious isn't just his pathetic punishment, but the fact that he apparently wasn't detained at any point. He broke into a woman's home and tried to seriously harm her and yet he wasn't arrested and got to go about his life while she lived in fear. As a matter of fact, he was just announced within the last month or two as being cast in a main role of the drama adaptation of BL Oh! My Assistant.