Ben Levi, to have proper hishtadlus we need information available to the president and withholding that wlll make one sick, needing great defenders (prakletim gedolim) to be cured which one might not be worthy of after illness. For this reason, Hashem creates the cure before tbe illness and we are suppose to pray not to get sick but prayer alone is not enough when the illness is rampant (shechiach hezeika).
