Atheists are held accountable by existing systems in society, just like theists. The only difference is we come together and decide what we will enforce while theists look into a book.
Whether or not a god exists does not affect whether or not an act is moral. That's why atheism (lack of belief in god) has no comment on morality, it's like fashion design has no comment on what constitutes a good novel. It doesn't mean fashion designers don't have favourite books, it just happens to be 2 different field.
It's religion that's obsessed with having moral authority where it should have none, maybe that's why you linked atheism to morality like it's even the same subject.
Whether or not a god exists does not affect whether or not an act is moral. That's why atheism (lack of belief in god) has no comment on morality, it's like fashion design has no comment on what constitutes a good novel. It doesn't mean fashion designers don't have favourite books, it just happens to be 2 different field.
It's religion that's obsessed with having moral authority where it should have none, maybe that's why you linked atheism to morality like it's even the same subject.