How can you know God if you don't know your big toe?
The body is the prop for the soul. So why not let the body be propped by a wall or a block?
Sirsasana the king of all asanas and the reasons are not hard to find.
Yoga allows you to find an inner peace that is not ruffled and riled by the endless stresses and struggles of life.
It is while practicing yoga asanas that you learn the art of adjustment.
Know your capacities and continually improve upon them.