Crab, you said "The argument about updraughting air producing VRS is cobblers"
Surely, the pitch setting is usually low when you enter a rate of descent, from the hover, prior to entering Vortex Ring! So, when you are sitting in a hover in a column of ascending air and then pull an armfull of collective, why can't you end up in Vortex Ring if the rate of ascent is high enough?
TeeS