Yup. Actually, the part of the brain that kept us from eating rotten meat or toxic plants as monkeys now also regulates moral disgust. Humans are programmed to hate that which is bad for them. Of course, you can overcome this preprogramming by jamming yourself full of food and making your body ignore good impulses (run) and embrace bad impulses (eat everything!). It does take effort to get to deathfat, it's just all the wrong kind of effort