PSY of ”Gangnam Style” apologizes in response to fans' comments saying he's ”disappointed” in his self-management... Why is he apologizing?

Singer PSY has once again vowed to take control of himself. On the 4th, PSY posted on his SNS, "When it's cold... I'm this guy, this guy is me. Samoktagram (feat. Moshi) is in control.
He posted the video with the caption, "Injury is a way of life." (Samokutagram is thought to be a combination of PSY (Psy) + mokuta (to eat) + Instagram.)
In the video, PSY can be seen slurping down jjampon.
Although she has been posting photos (including a video), some netizens have commented, "She's lost weight again. Why does she keep losing weight so many times?", "She's not taking care of herself. It's disappointing," and "She needs to take care of herself."
Prior to this, PSY had revealed his recent weight loss, but was told to maintain his usual plump image by saying, "I don't take care of myself."
This has since become a laughing matter of irony. Again, PSY responded to this comment by saying, "I'm sorry," and began his "apology."
Meanwhile, PSY is heading up the management office of P NATION and meeting audiences at their summer brand performance "SUMMER SWAG."