The Bible attempts to do what science attempts to do, which is to explain how the world got to be as we find it and how it works. For example, why does man have to eke out a living while women suffer in childbirth, then eventually get sick and die, rather than live forever in paradise, like a garden where one just plucks his meal from a tree? Why do we speak different languages? Assuming a tri-omni deity, why isn't the world better for us?
But biblical mythicists were just speculating after assuming the existence of a god, and generating stories that conform to that foundational belief, whereas man eventually learned that he needs to consult nature directly rather than holy books to unravel its secrets, something none of the mythicists understood, which is why there are so many disparate creation myths. They're untethered to reality.
There is no burden of proof except with another critical thinker. Disproof (falsification) is a cooperative effort requiring that both participants be able to judge whether a conclusion is sound, and possess the willingness to change one's mind when seeing a sound conclusion that falsifies one's beliefs (open-mindedness). Faith puts an end to that.
Except when they are your own, correct? Every declarative statement you've posted is a statement of personal belief, even the belief that they are facts, or that they come from a god and are found in a specific book, or even that a god exists. Those are all personal opinions for you, none of which the atheist shares.
This is the language within religion that translates to avoid education and learning critical thinking skills. Sometimes we are exhorted to ignore the wisdom of the world, sometimes to be more humble, to esteem faith as a virtue, or see submission as a virtue - all in the service of keeping that mind childlike and preventing thinking that can serve as a defense to indoctrination. These values are exactly the opposite of humanisms' values, which esteem reason over faith, education over childlike thinking, and autonomy over dependence.