So?
Science cannot be involved in everything anyway... there are things that happen in life that won't get a scientific explanation.
Again.... so what? It's life, let people believe what they want. Just because some things can't be tested in lab doesn't mean anything, really.
The sheer amount of things we do in life with little to no evidence testifies to the fact that science doesn't need to get involved.
Try explaining to your mate that you won't buy a house or go on vacation because you don't have "sufficient evidence" that your venture will succeed. Tell her you won't go to work until you have "testable and repeatable" evidence confirming that you will make it home safely after work for the next several decades.