Well, that’s an unwise conclusion. I’d recommend that you read the G.K. Chesterton essay, “Why I am a Catholic.” It’s not primarily about angels and demons, but he mentions why belief in them matters.
Read it. At least you were slightly different and didn’t suggest I read C.S. Lewis. I’ve read all of his stuff.
I can’t believe. It’s not in me. I have tried, but the voice of reason is always stronger.