They might make people feel good at AA meetings, but they cannot be used in a public discussion on the nature of AA or whether charges that AA is a cult, a fraud, dangerous, etc., are true. Also, I have heard that Atheists claim proof of the non-existence of God. You have heard wrong. The people who say that atheists have proof that there is no god are ignorant of the philosophy of atheism and of philosophy in general. Philosophy says that nobody can prove the nonexistence of anything.
Atheists simply lack a god belief.
Some think they know, but most don't. You see, I made the claim, and it is my responsibility to back it up. Otherwise, you have no business believing my claim. It is not your job to disprove my claim. I would have to cough up the passage before you had any right to believe my claim.