The problem with "trust your gut" is that intuition is a skill which needs to be honed. Everyone has different levels of blockage to being genuinely in touch with their "gut". I think some people are more naturally synthetic thinkers and already live in a more body-guided way. For the walking heads like most of us here on HN we would need to spend time re-learning how to calibrate the body to give precise readings. So the advice needs some caveats.