Well-researched question but I find it silly nonetheless. Something like concentration attainment is the cause of everything holistic we have today: acupuncture, chi gong, kundalini activation, etc.
"Jhana practice" = centering oneself on blissful state
- ther are myriad, infinite ways to achieve this. My teacher said even scratching your ear is a type of jhana!
- i've read many accounts of the Buddha leaving home and learning from many yogis, many of whom manifested the blisses and powers of dhyana.
- the buddha also spontaneously entered dhyana on his own as a child
vipassana = practicing pure, naked awareness
- a crucial practice for self-awakening but is learning to be pure and nakedly aware really a buddhist invention? can buddhism or anything own being purely aware of the present moment?
These are fundamental practices for not just humans but any being.