Why are spiritual beliefs less important than fact?

The question of which is more important, spiritual beliefs or proven fact, is completely subjective. People have different opinions on that matter just like they do on every other matter on earth. The real question is what is more important to you. People live their lives how they see fit and if they don't exactly agree with the way you live yours, that's ok. Don't worry about what other people think of your values. You're the one that has to look at yourself in the mirror every day and as long as you're satisfied with the person staring back, you're on the right track.