People don't believe in supernatural for a variety of reasons. Sometimes for good reasons and sometimes for bad reasons. One line of "good" reasoning is that supernatural claims are fundamentally indistinguishable from others. You don't seem to understand that. Many supernatural beliefs stem from the exact line of reasoning you present: I don't understand why X happens but I can imagine that [insert supernatural explanation] causes it. Therefore I believe [insert supernatural explanation] causes it.
Do you not believe that the Bible was written/inspired by a god? Are you some type of deist or christian "heretic"?
Just look at the "evolution" of god as an example:
Do you see a pattern?
* We don't know why our crops failed so "God-did-it".
* We don't know how the sun moves across the sky so "God-did-it".
* We don't know why lightening occurs so "God-did-it".
* We don't why the earth shakes so "God-did-it".
* We don't know why there are so many different types of plants and animals so "God-did-it".
* We don't know how life first started so "God-did-it".
* We don't know exactly how consciousness works so "God-did-it"?
* We don't know how the universe started so "God-did-it".
You present the latest iteration of flawed thinking that has existed for thousands of years: We don't know how or why X occurs but I can imagine a god-did-it therefore I believe "God-did-it".
"Maybe" the universe has always existed. Maybe it was never created. Maybe it was created by a supernatural unicorn who can only create universes and then the unicorn died. Maybe we are all a simulation being run by humans in the future who are re-creating the past in giant computers. Your imagination is a piss-poor standard for determining what is true and what is not.
Are you concerned with what is true or are you only concerned with what beliefs make you feel happy or satisfied?
Furthermore, you don't understand that no supernatural explanation is required. There are things in this world that you may never understand or know before you die. Imagining particular solutions for these questions doesn't make them true!
1) Everything I know of that exists has a cause
2) The universe exists
3) Therefore the universe has a cause.
Do you know what this fallacy is called?
People let go of literal interpretations for a variety of reasons to long to list here.