My intent was merely to point out that it is a commonly held belief, because it seemed like you were not aware. I didn't want to champion that belief.

But since you've invited me to name the moral error, sure. Accepting a fiduciary responsibility to chase after profits in a context where that very clearly means finding ways to deny people access to healthcare is a moral error. If you can't ethically do a job you shouldn't take that job. At best you're lying to shareholders, at worst you're killing people. The only ethical path is to go find a different job.