^^^ That threw me off-guard too. Thankfully I've never been robbed, but in my mind, if I can reasonably believe that I can prevent/stop it without being injured or worse, I would do it. What world is this where we must give away all possessions to criminals. Even if the police catch the guy, he still got your money/valuables.
Now obviously you must assess any such situation and not needlessly put yourself into harm's way, but a policy of always submitting unless you can tell they'll harm you anyway kind of rubs me the wrong way. I'm not sure I agree with drawing your weapon on an unarmed assailant (which is probably illegal in many states), but I definitely would not want to give him/her my stuff if I could prevent it.