He has a more manly face, less feminine looking. That could be a reason. Also, it’s been 12 years.
From that point of view yeah, but for someone who is in their 30s he looks older than actors like Le Dong-wook or Gong Yoo who are around 10 years him. Though it may be because of the hairstyle.
P.S. nvm I just realized the list may become endless considering there are many others like Legend of the Blue Sea and multiple others.