AJ is basically the very close relative to KQ. It looks really good but a lot of
hands beat it. With that being said, if the opener is a tight player, it's an easy fold. If the opener opens a lot of hands, easy call or even 3-bet. If you're on the bubble, you can definitely fold it if you're trying to make it to the money.
Just a lot of different situations calls for different actions. There's no 100% right way to play the hand.