People with their own conditions can change their appearance through plastic surgery and make themselves more perfect and confident. I don't think there's anything wrong with that. After all, he didn't affect others. This is his own choice.
However, I don't think it is recommended to borrow money or loans for cosmetic surgery if the family conditions are not so affluent.
I think there is nothing wrong with cosmetic surgery if it makes you happier and more confident, but it should be arranged according to your actual situation.