I didn't _disagree_ with what you said. Yes there are certain people who have spent a good amount of their time working towards noble and challenging causes who have my utmost respect. I fully agree with your first point.
By saying things like "And who cares about law school or baseball teams", you are belittling a whole set of people. Saying "sailing solo is more admirable than working towards law school" might be accurate, but the way I read it - "law school? You haven't sailed solo around the world, hence your existence is invalidated".
As for the troll remark, you're a new user with no real identity making relatively controversial and somewhat personal statements with a relatively disrespectful tone. I'm not too sure what the textbook definition of a troll is, but this is the closest one I've seen over here.