[Agedprepdoock]

all we need to attain Nibbana is a hefty dose of propofol or ketmine, or perhaps a bullet to the head. It's asinine.

Absolutely, spot on. It's for this very reason that many dry insight people choose to reject Jhana and refer to the practice as a 'deep state of concentration' rather than as an 'abiding'.

IMHO this is what Buddha had already tried under his previous teachers before he recalled the Jhana he had experienced as a child. He hit on something very different and began to teach it.

I have also read warnings in Tibetan and Hindu sources about blanking out in this 'switch-off' meditation and the example he cites is really like being under heavy morphine.