> Added time was introduced because of an incident which happened in 1891 during a match between Stoke and Aston Villa. Trailing 1–0 and with just two minutes remaining, Stoke were awarded a penalty. Villa's goalkeeper kicked the ball out of the ground, and by the time the ball had been recovered, the 90 minutes had elapsed and the game was over
If you didn't let the ref continue the game to their discretion it would make time-wasting tactics even worse. At least now if a team is adjudged to be taking the piss with the timewasting the ref can just mentally tack another minute or two onto the game. It's good that there isn't a "hard stop" that will end the game even if an attack is in full flow.