2 Corinthians 5:7

For we live by faith, not by sight.

The whole concept of faith implies believing something without proof. Not a long stretch to see how people might believe in other, non religious, things without evidence.

I do really want to try the maggot cheese some day.

I second opensuse, there is also a non-rolling release option, i think.

My tumbleweed has been exceptionally stable, updates without problem.