In many ways, this is similar to being an atheist, (I definitely do not believe in any specific god or religion), but strong atheism requires even more faith than being religious. An omnipotent being is not a logical contradiction, while being capable of causing any kind of results to your testing, and thus there is absolutely no way to prove the nonexistence of an omnipotent being.

If there's no way to prove the nonexistence of an omnipotent being, this is the most egregious example of a belief not paying rent.

This is the same reasoning that one should give for not outright rejecting the hypothesis that the universe was created last Thursday, with all of our memories of everything beyond last Thursday being a fabrication. There's no way to prove it wrong, so by your logic you can't reject it outright.