Evidence from the purpose

I recently had the opportunity to read Noa Yaron Dayan’s book, “My Founder,” in which she describes the process of her conversion.
While browsing the internet, I saw a post criticizing the book (although praising its honest and touching writing), that there is no intellectual argument in her words, and that all her motivations for repenting are based on various emotions. The truth is that at first I quite agreed with this criticism, but on second thought I think that the things are not accurate. The main point that emerges from the book in various guises is the feeling (which I understand is both intellectual and emotional), 1. That there must be some purpose to our lives, 2. That this purpose is not pleasure, fun, work, family, etc., but something more uplifting (again, in my opinion, this may sound like an emotional argument, but it also contains a very fundamental intuition). All the colorful descriptions in the book only sharpen, highlight, and illustrate these points. Am I right? Is there any place to bring evidence for the existence of a religious God from the claim that there must be some purpose for our existence in the world?