The focus of yoga in inward. You focus on taking care of yourself, rather than on doing any posture in a particular way. Adjustments are good. Supports are good. Whatever it takes to make yourself comfortable. And then, relax, take your time, and expect to feel just a little better each day.
Miracles? Maybe. Here is a yoga miracle. Please DO NOT “attack” yoga in this way. What was clearly right for this gentleman (an experienced parachute jumper) is not appropriate for most of us. The results however? Yes. The point is that anyone can benefit. Take care, relax, do it your way.