Marxist Theory is Confusing: Change My Mind

On page 161 of Beginning Theory, Barry states: "... instead of seeing authors as primarily autonomous 'inspired' individuals whose 'genius' and creative imagination enables them to bring forth original and timeless works of art, the Marxist sees them as constantly formed by their social contexts in ways which they themselves would not usually admit."

I think that this is not necessarily a one-or-the-other situation. If this is true, and they are not definitely independent of each other, do you think it's possible that an author's inspiration and genius come from their social contexts? They can become inspired individuals through their experiences, not necessarily just born geniuses.

(Sorry if this doesn't make sense or sounds redundant, I don't fully understand this haha).

https://imgur.com/gallery/rLs7G