My naive questions

[DeistPaladin]

By analogy, there could be a better spouse for you than the person you're engaged to. You don't need to date every single eligible potential mate in order to make a decision. By that logic you'd never get married.

You don't need to research every single career in the world in order to select one. By that logic you'd never have a career.

I can prove my wife exists.

I can prove my job exists.

A better analogy for your choice of the Christian religion is if you married a woman but you've never met her. No one else you know has ever met her either. You don't know for certain where she lives exactly but you believe she's out there somewhere. You have some letters allegedly written by her that were handed to you by someone else. That's the only "evidence" you have that this person you married is even real.

You also have a job too but you don't know where it is that you work. You believe that your job exists and someday you'll get paid for it. Someone told you that you've been hired by some other mysterious character that they in turn have never met but you have no evidence that you're really employed.