AWAY GOAL, EXTRA TIME, WHY?!

Not too bad tonight, we won in 90 and in the game, players went missing when it came to the nitty gritty, but that is not my grievance.

I want to put this to all of you. Why does a goal in extra time count as an away goal, surely that is giving the away side in the second leg an extra 30mins to get that away factor.Wouldn’t it be easier to agree that extra time is 0-0 start again for 30mins?!