And then the chapter goes on to give examples of people who had faith—none of which did what they did or believed the way they do because of anything describable as what would count as evidence in science, or a court of law.
This is not to say that the faithful are irrational or even that they are wrong. The faithful have good reasons to believe as they do, but those reasons are not confirmed by evidence.
Why is this so important? Well, what do you do when all the evidence says you are doomed to fail? Or that there is no way out? Do you give up? Or does your hope, as Hebrews says, consist of things not seen?
If the faithful insist that their faith is confirmed like any other belief is confirmed, they will miss the whole point of faith, and when the time comes that they need that kind of faith, they find they don’t have it.