Whether that's exactly his reasoning or not, there's no doubt that it's exactly the vibe that he gives off, and exactly why he is so beloved. People are attracted to the sense of existential authenticity that he exudes.
If this were the same for some other person who sees that money is being possibly taken out of his pocket because of someone else using his likeness without his permission, and he isn't quite set for life money wise the reaction might be understandably quite different.
His lack of an agent and the difficulty of getting him to agree to actually do a film suggests that money is not a motivator for him generally.