I don't have one. It's conjecture. It's a bit like saying, if Roofe runs the ball into the corner, it would then be impossible for StJ to score before the end of the match.
Just the same as the Roofe shot, which led to a goal kick, is the reason we lost the lead.
We defended their next attack. The goal was not Roofe's fault.
Yer man is using the reasoning of IF. So am I.
IF Roofe had missed to the right instead of the left, the goal kick would have been taken from the other side, causing the game shape to be different at that point. IF Roofe had held the ball and lost it, they could have scored from open play. Like I say, conjecture.