The scientific method has little or nothing to do with finding what one perceives as spiritual truth, or answers to questions one has.
Some need eternity.
Some accept the finite.
Some need rules.
Some need only guidance.
Some seek independence with aid from the divine.
Some would prefer to have a shepherd.
It is not for one person or one group or sect to decide which is best for a single person; not all paths are.
Your last sentence is what I've been trying to say all along. Far too many self-proclaimed Christians knock on my door, try to hand me tracts in malls and other public places in an attempt to convince me that if I don't believe what they believe I will suffer eternal torment. While they have every right to believe that, I don't and I get very tired of the continual proselytizing. I do not try to convert others to my beliefs and would appreciate it if others could at least pretend to accept my right to believe as I do.
"When it shall be said in any country in the world, my poor are happy; neither ignorance nor distress is to be found among them; my jails are empty of prisoners, my streets of beggars; the aged are not in want, the taxes are not oppressive; the rational world is my friend, because I am a friend of its happiness: When these things can be said, then may the country boast its constitution and its government." -- Thomas Paine: The Rights Of Man (1791)