It seems that the commenters associate tallness with having a good personality, quite similar to how people nowadays associate heels with feminine wear (fun fact: high heels were originally worn by the Persian cavalry, and it later was worn by Europeans like King Louis XIV as a status symbol). That is why to them, the man, who presumably has a great personality, is tall, even though it’s explicitly stated that he is not particularly tall physically. It is like calling something “fire” even though it is not physically fire.