When people thank God (or Jesus) for something good that happened or ask for his intervention in a minor (or major, for that matter) life crisis, don't they stop and think that
1. God doesn't have time for your shit
2. If you believe he can help you out of the mess you're in, you have to believe that he put you there in the first place.
3. If he has the power to bring down your kid's fever as you seem to think, isn't he a bit of a douchebag for allowing all the suffering in the world? What makes you so special? Do those other people deserve to suffer while God takes care of your kid?
Which brings us back to number one.