Is the the current form in which Yoga is being propounded (stripped of metaphysical aspects) distortion of Patanjali rishi's teachings? If Yes, then is yoga as a physical practice amoral and neutral but can any meaning and function be imported into its form?
Main argument of new age gurus is that Yoga is a technology/phenomenon/natural law etc. Just like gravity cannot restricted to one religion, same is applicable for Yoga. They want to spread yoga as a non-religious scientific tool to enhance human wellbeing.
This is great. But just like Gita is meant for entire mankind, it is still a scripture of Hinduism and distorting its content does not yield benefits.
When it comes to Yoga, I gather chanting mantras is an integral component. So is it really called Yoga when mantras are not chanted ?
Also from what I gather is that there Asana (which is projected as Yoga) is just one of the eight limbs of Ashtanga Yoga. Is it ok to assume one may not derive the intended benefits by ignoring the other limbs or for not carrying it out correctly (i.e. by not chanting the mantras) ?