Some Christian pseudophilosophers accuse scientists and skeptics for being "naturalists" and "anti-supernaturalists." In other words, they accuse them of having the bias and preconception that only the physical exists, and every single phenomenon must have a physical, natural explanation, and that supernatural explanations are rejected outright, without consideration and as a matter of principle.
While extreme naturalists (ie. those who really and honestly think like that, and who willfully reject even the possibility of the existence of the supernatural) are a relative minority of all scientists and skeptics (the majority of them not rejecting the supernatural outright, but considering naturalism as the default position until otherwise demonstrated), even extreme naturalism is quite justified. A lot more justified than the opposite.
The reason for this is that naturalism just outright works, and gives real, tangible results that have a real effect on the real world, and has been so for millenia, while supernaturalism has an abysmal record on this.
Every single step in our technological and medical progress, every single discovery, every single advance in both real-world useful knowledge and in practical applications, has been a pure product of naturalism. In other words, of studying the physical world, finding out how it works, and applying that knowledge to affect our surroundings.
And not only has every single such step been thanks to naturalism, it has been extremely efficient at it. We make more progress via naturalist techniques and approaches in one year than supernaturalism has done in thousands of years.
Supernaturalism is just useless for anything tangible. Our knowledge has not advanced thanks to it, our technology has not advanced thanks to it, our medicine has not advanced thanks to it... in fact, nothing of real tangible value has advanced thanks to supernaturalism. Supernaturalism has not contributed in any way, shape or form to our current level of progress. The only things that supernaturalism has affected are fuzzy abstract notions, opinions, behaviors, feelings and personal subjective experiences. None of which has actually helped progress, nor can be demonstrated to be actually caused by anything supernatural.
So why exactly should one believe in the supernatural? Not only is pure naturalism a good and pragmatic choice, it's the only rational choice.