At what point does an honest shot like that from Torreira get deemed an own goal

[Burney]

Stupid rule. By that logic, if a shot is on target and is deflected wise, a goal should be awarded.

It is a stupid rule. If the attacking player hadn't taken the shot, there wouldn't be anything to deflect, so it should be given to the attacker regardless.

Own goals should only be awarded when the defending team scores against itself with little or no input from the opposition (the classic Lee Dixon-type own goal, if you like).