reactance theory informs us that whenever a person tells us what to do and how to do it, we respond with defensive defiance because we want to maximize our personal freedom and decision-making.

http://www.psychologytoday.com/intl/blog/do-the-right-thing/201407/giving-people-advice-rarely-works-does?amp

Just cos I know it’s good advice doesn’t make me want to do it, and if I don’t want to do it, I can’t, that’s just science.