Why atheism is a belief.

[JoopWoop]

You have assumed that evidence is available and observable;

Exactly. You'd be amazed how many theistic shitheads try to claim that whatever brain fart they have at any given moment is "evidence."

It isn't.

Yes but that's an extreme position and one which won't convince many. Conversely to claim your position is objective and logical you would need some viable alternative to some first cause, creator etc to effectively discount it. Otherwise it will always hang around.