The commercialism may wash off sometime later.

Yoga is the music of the soul. So do continue, and the gates of the soul will open.

Yes, flexibility of body and physical perfection for Yogasana is important. However more important is the state of your mind, Meditative mind. Your flexibility might be excellent but if your mind is not attentive, you are merely doing some physical exercise, not Yoga.

I also say with backbends, you have to be cautiously bold. Not carelessly bold. You have to descend to the dictation of the spine. You cannot command from the brain to do the poses. As you play with a child, guarding the child from injuries, similarly you have to play in backbends, guarding your spine.

I don't stretch my body as if it is an object. I do yoga from the self towards the body, not the other way around.

You must purge yourself before finding faults in others.

The needs of the body are the needs of the divine self, which lives through the body.