If his family actually knew what was best for him they would allow him to regain his memories. He deserves to know especially because they all knew and he didnt it seems as if they were playing him (exactly what was intended). His relationship with jiyoung (hakyung) meant a lot to him and they knew that. I think it's just to protect themselves from him lashing out at them. His amnesia has clearly taken a toll on him in the past years along with his gramps death.
If his family actually knew what was best for him they would allow him to regain his memories. He deserves to know especially because they all knew and he didnt it seems as if they were playing him (exactly what was intended). His relationship with jiyoung (hakyung) meant a lot to him and they knew that. I think it's just to protect themselves from him lashing out at them. His amnesia has clearly taken a toll on him in the past years along with his gramps death.