you will never know in what ways certain experiences will bring great benefits later in life. That you should follow your true interests even if you think that it will bring you no other benefit than satisfying your curiosity. Because down the road you never know how those experience could end up being extremely valuable to you, in ways you never imagined, at just the right time in your life.
So your experiences are like dots on paper. If you follow a rigid tight path through life you look back and get a straight line. If you have diverse experiences in life you look back and have enough dots in random places to connect them and form a picture.