Even more there are fathers and mothers who have willfully not given their children medication, for diabetes as an example, who believed fully that Jesus would come through for them. They clearly believed and they lost their child for it. Reality simply doesn't line up with the Bible or what it says. For that reason, my only option is to disbelieve what it says.
To base you rejection of what the Bible says, when it doesn't say it, based on the actions of a few, is illogical. It is actually an excuse for not doing something you don'[t really want to do, IMO.