It sounds like you have a really solid background outside of academia. That said, I would not advise dropping out at this point. The reason being that you did not mention any concrete plans or anything pulling you directly away from school.
Feeling that it does not have a purpose for you is valid and understandable, but there is probably a lot to going through college that you haven't taken into consideration (internships, finding partners, etc) that could be very beneficial.
My final thought would be that if you at some point in the near future have something immediate that you want/need to do, then it might be a viable option. At this point, though, I would stick it out.
Feeling that it does not have a purpose for you is valid and understandable, but there is probably a lot to going through college that you haven't taken into consideration (internships, finding partners, etc) that could be very beneficial.
My final thought would be that if you at some point in the near future have something immediate that you want/need to do, then it might be a viable option. At this point, though, I would stick it out.