I experience the opposite. I find that human-to-human relationships are simple, but a relationship with God can be extremely complicated.
Nevertheless I do understand what you mean and I can see how it would be as you said for the believer who does not wonder about all things God.
Human-to-human relationship: You talk to them and if they are kind, compassionate and understanding they talk back to you and help you and you feel better.
Human-to-God relationship: You talk to God and all you get is dead silence. Sure, people can imagine that God is speaking to them, but that is all they can do. If that makes them feel good I have no problem with that but just count me out, as I do not need an imaginary friend, I want a real friend...
Don't get me wrong, I believe that God exists, I just do not believe that God communicates directly to any humans except the Messengers of God who are both divine and human.
Other than saying the regular Baha'i prayers, I do talk TO God on occasion, but I hardly ever ask for anything unless I am really desperate, and by that time I am pleading, not asking. I have been doing a lot of that lately. I think I do get assistance within the next day or so by way of thoughts I have and people who help me, but I could never prove that assistance came from God. That is just a belief.
I find human relationships complicated... I don't find they're always kind... or unkind. What means one thing to one person means another to another person.
I've had some profound 'conversations' with Gods. You would think its all in my head, and you're free to believe that, but I guess in the end its just two beliefs against each other.
What do we(humans) really know, anyways? What works for one doesn't work for another.