Definitely not. Lookism is a work of fiction. The plot and scenarios were crafted by the creator to tell an interesting and captivating story, not drawn from real events or people.
I think 'Solo Leveling' has a great story. The concept of a weak hunter becoming the strongest is very appealing. The story is full of action - packed battles and the protagonist's growth journey is really inspiring. There are also various mysteries and political elements in the manhwa's world that add depth to the overall story.
Well, from what I know, the 'lookism light novel' focuses on the concept of how one's appearance can shape their lives. It could have a main character who is constantly judged by how they look. This character then might go through a journey of self - discovery, trying to break free from the constraints of this look - based society. There might be different sub - plots involving the character's relationships with others who are also affected by lookism in various ways.