“That curmudgeonly selectiveness is a net positive for skill development, study authors Justin Hepler of the University of Illinois and Dolores Albarracin of the University of Pennsylvania argue.”
Warning: psychobabble incoming.
“… likers may adopt a jack-of-all-trades approach to life, investing small amounts of time in a wide variety of activities. This would leave them somewhat skilled at many tasks. In contrast, when haters find an activity they actually like, they may invest a larger amount of time in that task, allowing them to develop a higher skill level compared to likers.”
Wasn’t that called taste?
“This same pattern could also be relevant to attentional control. For example, likers may have more difficulty sustaining attention on a task because they perceive so many interesting and distracting opportunities in their environment. In contrast, because haters like so few things, they may be unlikely to be distracted when they are doing a task, and thus their generalized dislike may actually benefit their attentional control.”
When you ignore the BS of idiots, things get better. I can attest.
“But it’s still quite interesting to have research that takes a behavior that we tend to judge as “bad” — that of being a hater — and shows its more positive qualities, in the same way that neuroticism can be channeled into critical thinking.”
These traits developed and remained for positive reasons.
Overall, if you disapprove of something, you’ve probably put enough thought into it to have reasons. I think that’s the true cause.