yr right,
14 years of dedicated low level flying I reckon I have covered pretty much every itteration of low level bump, can't believe for a moment these things present significant downwind turbulence.
The RFS do many a strange thing often based on a CYA attitude, this follows those principals.
20,000 hours....meh, I've nearly got that many and I'm one of the dumbest people I've ever met.