Your argument is completely illogical. Poor outcomes can happen in the best of surgical circumstances; if there is no incompetence or negligence, there is limited liability. Any attempt to lie about the results or consequences will increase the liability several fold. A physician can be found to have acted in good faith and expertise, and be held harmless. If he misrepresents the facts in any way, he loses all credibility and will be held responsible at least for ethical violations. The CYA you speak of would therefore become a harbinger of guilt, so it doesn't happen that way.
Any particular reason for your negativity?