I agree and disagree with you. From my experience, I can tell you, that I never imagined I'll be interested in things that I learned in classes which weren't my cup of tea.
For instance in our country, we have so many young people with a high education of their favorite choice, but they can't get a job. The country, I'm living in is seeking young and smart people with education from natural science with so many experiences that they cannot get during the study. And we have so many people, who finished in social science, but cannot get a job, because of all the old people who don't want to retire.
I think for a student it's great, that you are learning things that you love to do and you have fun doing it, but at the same time, you narrow your possibilites for employment in so demanding world that we are living now. So I must say, that it never hurts to learn something new. Who says that the education is the limitation for future?