I had a thought this morning.
Imagine if you hired a company to build you a house, and then you immediately started building the house yourself. This would be silly, and would confirm that you didn’t think the company would do the work for which you hired them (and, thus, would probably offend the contractors).
Yet, this is what Christians do pretty much every time they pray for something. They will pray for someone to be cancer-free, but also take them to the doctor. Why? Unless you thought prayer would not work. Why pray to god to help you find your car keys if you’re going to look for them yourself unless you expect prayer to not work?
For people who will wax lengthy about how prayer never fails, their actions depict people who assume prayer never actually succeeds.