It seems like you can't get treatment for anything major at all without it impacting your FAA medical and chances at keeping your job. Things such as sleep apnea, depression, etc are best left untreated under the current system. Unless you can do so "off the books". My thinking was the AME (if he also were your PCP) would give you a warning before continuing with certain treatment options... Perhaps by saying "you might not want to take this route because of what it could mean for your medical", etc.