There are atheist who strive for perfection because they ve been raised to do so, they eliminated the competition and rose to the highest, most powerful places in society, they re highly valuable , contribute a lot , are role models, and ...they dont believe in any god.
And there are despicable, hypocritical , lying "believers" who only contribute to society by claiming constantly they re holier than everyone else.
Fact is, there is no need for religion and the belief in a god to become useful in society, for for your species. All depends of your education, and education can create strong individuals without including the reference to any god.
In fact all that matter is to be a better competitor than others to survive and dominate , have a better preparation and more luck than others. This is what actually decides of your place in the social ladder, also known as the food chain. No need for any god.
It s not the most religious families who produce the most important, rarest, ideolized individuals, its the toughest, most pernicious and willing to do it all to survive families who produce them. And more often than not, there is nothing godly in the way they rose to power in their society/species.
The biggest , smartest, fastest assholes get the most fun, while the weaker individuals have to submit to them hoping to one day rise to their level. Most only want their protection.
There is no need to believe in a god to become dominant, it all depends of your education. Any kind of efficient education, that molds a kid to become the biggest manipulative asshole, is all that is needed to get there. No need for any god to raise a superior offspring that will dominate. Just teach it how to kill instead of being killed.