This is some deeply messed up thinking, IMO. If we followed it seriously, it would end up with some very morally problematic thinking: "maybe the earthquake was a good thing. Yes, it toppled some buildings and destroyed a daycare, but maybe there's some hidden good in all those crushed kids that we aren't seeing."I don't think you or I with our finite view can legitimately say that God does things in a monstrous way when we can't know all the details, see the entire picture, or comprehend the eternal dimension and ramifications of a situation.
Also, if you took it seriously, you would apply it to any consequence, not just the consequences you attribute to God's actions: "Your honour, I ask for leniency in sentencing. Yes, he really did mean to commit this murder, but who among us can be sure that he wasn't doing the world a favour by shooting his innocent victim? Maybe the world is better off because of what he did, and this should be reflected in his sentence."
Take the earthquake example I gave: if the earthquake and all its suffering is "God's will" and a net good somehow, then it would be wrong - or at least wrong-headed - to try to go against God's plan by trying to alleviate that suffering.Maybe you could more clearly elaborate exactly what you mean here or the point you are making.
OTOH, anyone who has declared through their action that the suffering of the earthquake is bad and that it ought to be alleviated by, say, doing search & rescue, providing medical care, and preventing future catastrophes by rebuilding the city to better seismic standards is demonstrating through their actions that they believe that the suffering is not a net good, and probably that it ought not to have happened in the first place.
Any time a Christian, in the name of Christian charity, helps relieve someone's suffering, hunger, affliction, etc., they're saying through their actions that they believe the world is more perfect with that problem fixed than with it left unaddressed.