Just because the dealer bust rate is over 50% does not mean it is the correct play. The dlr bust rate is the same for hitting and doubling. I didn't see any calculations that indicated that DD and ending up with a stiff with twice as high a bet surmounted the option of hitting multiple times, not even counting risk aversion. Even if I had, performing such mental gymnastics at the table instead of using index tables makes no sense to me.

If the shortstop snags a ball, he does not go through the calculations of where to throw the ball depending on the number of outs and position of runners. He knows this before stepping on the field as he has prepared himself in advance.