Only you can change yourself, that's absolutely true, BUT ... You can't discount the importance of others in helping you figure out the things you want to change and how to best go about changing them. Science can explain the basis of everything, but it can't incite action the same way human interaction can. Alcoholics and addicts know they are killing themselves and continue without regard; however, once they see the impact it has on their family and friends the chances of change are much greater. With the proper support system and counseling successful change is possible. I know that is an extreme example when compared to productivity but a lack of focus and/or motivation (ADHD, Depression, etc.) is just as serious a disease. Kyle