Why would someone promote circumcision for reasons completely unrelated to money?

For a circumcised man, to acknowledge that circumcision is damaging means acknowledging that oneself is permanently damaged, which is difficult. Too difficult to some. So the easy way out of this horrror is to outright deny the harm, no matter how obvious it is. "I am not a permanently damaged person."

If one can't live with the thought of being a permanently damaged person, one might as well try to pretend there is no damage.

"It can't be harmful. Otherwise, it means I am damaged for life."

A person who has deluded themselves into thinking that circumcision is harmless might want to enforce this belief on their male offspring. How? By getting him circumcised too. If circumcision were not harmful, there would be nothing wrong about getting ones son circumcised as well.

And as such, the vicious cycle continues.