What's so great about atheism anyway?

[THWOTH]

[...]
Nah, there's nothing special about atheist. Being right about science and existence and stuff doesn't necessarily make you right about the really important things. Make the whole world atheist, there would still be wars and slaves and rapes and oppression and all the other shite. Why would it change just because no-one thinks there's gods any more? Could well even make things worse...

What are 'the really important things' which atheist aren't necessarily right about?

Are you not implying that atheism should be about or in some way responsible for challenging and/or ending injustices like slavery, sexual assault and authoritarianism - and if so why?

Of course we may limit the definition of an atheist to someone who 'thinks there's no gods any more' (nor were there ever), but in doing this atheist also eschew the self-declared authority of religious institutions and traditions along with their concomitant sets of beliefs and practices. So, in some respects, the atheist stands against and challenges a religious authoritarianism which demands that all must believe and do as the celestial dictator demands, as well as decrying the sexual discrimination inherent in many of the world's apparently automatically moral belief systems and the inclination of some of the fervently religious to oppress and harry those of different faiths or of no faith at all.

I suppose then we might say that even though atheism does nothing explicitly to challenge or end injustice it at least removes the self-righteous religious justification for oppressing others, seeking dominion over others, and controlling others by force on the dubious authority of an imaginary sky daddy concocted many, many years ago to comfort violent, ignorant and superstitious goat-herders (and sim.). Promoting an atheistic outlook as a reasoned and reasonable response to religious assertia in some way seeks also to limit or diminish the pernicious influences and immoral justifications for action proffered and/or demanded by the votaries of many so-called religious authorities.

I guess I answered my own question there then.