Parkour helps overcoming obstacles in real life situations, not only physically but mentally as well. Will we ever use what we learned physically effectively? Most likely will not, but you never know. Why do I personally train Parkour? Its fun, something you have to dedicate yourself too. I love to move, And allowing me to move better in the environment also helps In other situations be It Another art form or (like mentioned before) mentally overcoming obstacles by thinking outside of the box.
Most people have the view on us that we are dangerous, or reckless, but that's not the case at all. If everyone would take the time to understand what parkour is and why we do it, (everyone has there own different views) maybe they would see how safe and great of an opportunity it is for them to start training themselves.