antikfira – It seems your reasoning should take you in the opposite direction. As you recognize that everything that happens is in accordance with ratzon Hashem, that should lead to the conclusion that He must intervene when necessary. Case in point, my previous example: do you believe you have the capability, through bechirah, to blow up the world ?
Yes, the result of our bechirah will be one with the His will; how this works we cannot understand. But this means He def. WILL intervene when necessary.