We live in a universe of physicalities, that's because that is all that we can understand, process, and measure with our limited view. I mean we share 98.5% of our DNA with monkeys, we can't be that advanced evolution-wise. So therefore with everyone being on the same page physical-wise science is leading the way to explaining the universe that we see. Many people have hopped on board with science just because it brings answers as to how our universe works.
But people are capable of things beyond the physical, dreams, deja vu, love, understanding, and gaining knowledge. Those aren't very physical and yet they manifest in the brain. Could the brain be the spirit in physical form?