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if Punk came out and cut some big shoot promo about AEW, AEW fans would have called him petty and tried to spin it that they were rent-free in his head. Instead, Punk came out and cut a perfectly fine return promo about how he's there to make money and not make friends while taking one or two indirect swipes without mentioning any names, so now AEW fans are spinning it like he's washed up.
It was a "heads I win, tails you lose" scenario they set up.
Punk has moved on, it's best for everybody else involved to do the same.