Why God does not exist, in one sentence.

[Oh My High]

One could look at that the other way as well, in that the majority of humans believe in some sort of higher power. As non-believers are in the minority it is they who must prove the majority wrong.

Of course, neither of them can prove or disprove anything

I disagree. "god" is testable. Pick a deity, define it, and put it in empirical trial. For instance, the Christian god clearly doesn't exist and same with Thor, Ra, and the thousands of Hindu gods. Of course, then, you might counter-argue in favor for an ambiguous, panatheistic, "everything is god" "the universe is god" perspective which commonly is attributed to Einstein's sense of the word. If so, then you really wouldn't be saying anything at all. Most people don't actually believe in god, they believe in believing in god, they only use the word as protective coloration, as Steven Weinberg was fond of saying.