I'd agree at any other point in the match. But last minute of injury time, it's time to get men on the line.
Maybe if the keeper's gone up, the equation is changed, but if it's correct to not have men on the post (which, imo, it is) throughout the game, it's still the same in the last minute. It's not the sort of decision that is affected by the game state in terms of time left, e.g. it would be absolutely correct to scythe someone down who's clean through and concede a free kick 25 yards out in second half stoppage time, but five minutes into the game it'd be stupid. Yesterday, the point is to not concede a goal at all costs, you do whatever the best play is to try to sort that.