Buzz already knows my thoughts on this video.
But batting on off stump is not in itself a questionable technique.
Robsons problem is that his head falls over and so he misses straight balls.
Shane Watson did this and batted on leg stump but was out LBW More than any other dismissal.
Your guard is categorically not the reason you are getting LBW, your head almost definitely is.
Batting on off stump doesn’t change your head, and neither does batting on leg stump.
As for Butcher saying that this technique “is just wrong” I wonder if he is aware that the only 2 players to average over 60 in test cricket in the last decade currently adopt this approach.
Kane Williamson - who most regard as the most technically adept player on the circuit, bats outside off stump!
If your fundamentals aren’t in check, you will get out wherever you bat. All that video shows is that more county batsman nowadays don’t play straight because they fall over, and don’t have their fundamentals in check.