Science and vision are not opposites or even at odds. They need each other. I sometimes hear other startup folks say something along the lines of: 'If entrepreneurship was a science then anyone could do it.' I'd like to point out that even science is a science and still very few people can do it let alone do it well.
All the intelligence and talent in the world can't make a singer. The voice is a wild thing. It can't be bred in captivity. It is a sport like the silver fox. It happens.