Because the "something" in question is not decryption. It's actually specifically something with no useful result, just a benchmark.

Decryption with quantum computers is still likely decades away, as others have pointed out.

To be specific, the best know quantum factoring did 15 = 3x5, and when 35 was not able to be factored when attempted. Most experimental demonstrations have stopped in recent years due to how pointless it currently is.