[smtddr]

Here's how I think of it.

Smashing your shoulder against a heavy metal vault door as hard as you can over and over, hoping someone at the other side will eventually hear you and open the door is a waste of time. It results in burn-out with nearly no hope of progress.

Instead, you should examine the door and try to open it yourself with a very deliberate attempts of sound reasoning based on where the weak points of the door may be. And after awhile, you may even discover that you can walk around it... or maybe that door isn't blocking the path you should be on to begin with.