One aspect of yoga is towards ensuring your body isn’t an issue. The body is full of compulsions. It can be a terrible bondage. Or, it can be a stepping stone for something extraordinarily beautiful beyond your imagination. If you yourself are an issue, what other issue can you handle in the world? Physical yoga is relevant to prepare the body, mind, emotions and energies so they are not an issue. But there are other dimensions and aspects to yoga, and to reduce it to an exercise form would be a crime!