You have raised a very vital point in your post yes it's quite easy for people to say they trust God, meanwhile only the test of trials and tribulations can prove that. Just look at Job's wife who had everything going for her, but she never had the courage to trust God, in their time of distress.

Trusting God comes with the test of Kurt faith, it comes with endurance, however if we as mankind can trust in God, he will give us an expected end, better than we started