Kaiser doctors, because they're employees of the same organization that provides the insurance, are much less likely to prescribe treatments that will be denied. Which I like, don't get me wrong, but it's a double-edged sword. Many people with complex or hard-to-treat conditions feel that Kaiser isn't an option for them, because when they need some rare treatment another insurance company might fight you over, Kaiser simply won't prescribe it at all.
My wife is on Kaiser, she was having extreme, persistent back pain. Before she could even talk a specialist, they told her she needed to attend a live webinar about back pain that was scheduled for 3 weeks later...
Like if your argument being fiduciary duty to rob everyone blind health outcomes be damned, then why say Kaiser is not being sued in to the ground?