He DID get it wrong – World Rugby confirms referee Craig Joubert should never have given penalty that ended Scotland’s World Cup
But official could not have gone to TMO to decide

World Rugby admitted that referee Craig Joubert got it wrong when he awarded a last-minute penalty that secured Australia’s victory over Scotland in their World Cup quarter-final.
The global governing body gave a rare verdict on a referee’s actions amid an outcry in Britain over the penalty that Bernard Foley kicked to snatch a 35-34 victory for the Wallabies at Twickenham.
Australia now play Argentina in the semi-finals on Sunday following their close shave with an upset.

Maybe he was keen to get to the bathroom
Rugby’s watchdog rarely makes such damning verdicts public. While the review committee called out the 37-year-old Joubert, it said he remains an “important” member of the referee team.
He was not named to officiate the semi-finals this weekend however.