Too late for what? Developing self confidence and social skills? I've seen wonderful transformations in youth your age. 30-somethings and 40-somethings as well. For healthy exercise? Energetic rounds challenge the most fit athletes while the rest of us tailor dance to our needs. Physical fitness, emotional expression, connectedness, or just keeping old bodies limber and pain free; dance beats boring calisthenics any day. Dedication, goal development, a positive body image, challenging obstacles, overcoming failure? These will serve your whole life, and there's no better time than the early teens to start.
Winning the world championships? Life is a journey of many paths, not one fixed destination. People dancing late bring life experience to dance; people starting early can use dance the rest of their life. Refusing to begin; refusing to learn along the path; that is the only way to lose.