I would say that the only real reason someone would choose to do something that they would actually rather not do (as per their preferences) is that they do not want the anticipated consequences of NOT doing it to come true.
It seems to me that we are all naturally (and logically) following what we perceive to be the path of least resistance to get as close to happiness as possible and as far from unhappiness as possible. Of course, we all have different preferences. Our foundational preferences were simply not chosen by us at all. They are what they are because of the surrounding environment into which we were born, completely outside of our control.
See what I'm getting at?
Any activity that we BOTH have no desire to do AND know that not doing it will have no undesirable consequences is an activity that is fundamentally ruled out from possibility. We didn't choose our desires. To test this assertion, try now to GENUINELY cease desiring something that you strongly desire. Conversely, try to GENUINELY desire something that you have absolutely no desire for.
Can you do it? GENUINELY?