We don't have enough information to determine chemicals to be the initial uncaused cause.
It's the only evidence we have.
One point that I have brought up before, however, is that evidence removes the belief from the equation entirely.
If there is evidence, there's no excuse for belief.
Some argue that God, if God exists (and is the Christian version) wants people to have trust and belief in Him as a precondition to salvation.
Worst copout ever.
Leprechauns hide because they want you to have faith in them. The Loch Ness monster hides because she wants you to have faith in her. Bigfoot hides because he wants you to have faith in him. Martians hide because they want you to have faith in them. Phlogiston hides because it wants you to have faith in it. The earth pretends to be round because it wants you to believe it's flat.
Fiction is quite differnt than allegory or delusion.
That isn't true. A century or so ago, authors of fiction went to great length to suggest that their stories were true. They found the manuscript in a bottle or they were told the story by somebody they met in a bar.