What players do: They look down at A♣, A♠, and a couple of trump, see “lots of points,” and pick.
Why it’s wrong: Fail aces are bury fuel and walking points, not trick-winners. Tricks are won by trump. The foundational guideline is the 7-card rule: pick when your trump count plus fail aces totals seven or more, with real trump (not just aces) doing the lifting. Three trump and three aces is borderline. Two trump and three aces is a trap.
What to do instead: Count trump first, then ask whether your aces can survive long enough to walk. With 5+ trump, pick. With 4 trump and two queens, pick. With two trump and a fistful of aces, pass and let someone else step on the mine.
See: Why picking on aces fails and hand evaluation.