If prayer was effective, why would we need vaccinations? Why would we need medical technology? Why is it that medical technology is always more effective than prayer? Is God not as powerful as human ingenuity?
A believer might reply, “God works through science.” But that cannot be proven. It’s an assumption. If there was no God, wouldn’t we still have come up with the solution? If not, how exactly did God work through science? Why did he wait thousands of years to “work through science,” cruelly causing billions of deaths simply by withholding basic information?