"Religious suffering is the expression of real suffering and also a protest against it. Religion is the opium of the masses. Religion is the heart of a heatless world. Religion is the soul of soulless conditions."
Religion isn't a separate thing from culture that can be cleaved off like this. The form it takes is contingent on conditions of people's lives and power structures. People also don't make a conscious choice to believe or disbelieve in religion, if you're an atheist you can't just willingly choose to believe. Society is not directed by the willful actions of people's collective beliefs like this either, it's more a Darwinian process.
Also civil religion is a thing and it doesn't necessarily align with what people think of "religion" but operates in a very similar way. A lot of atheists are probably adherents to aspects of civil religion without knowing or thinking of it this way.
if you’re an atheist you can’t just willingly choose to believe
I wouldn't really agree with this. As a programmer, I was always sceptical and an atheist, but I never had problems with believing into something obviously not true, such as when LARPing or TTRPGs. And when I once got into a rabbit hole of mysticism in high-school, one of the movements I read about was advocating for doing "paradigm shifts", forcing yourself to believe into a specific religion, like truly believe, so you can try it out in practice and see whether you get something out of it or not and should move on. And since that felt like a fun experiment, I tried it with various dogmas or religions, and once you get over the inherent jugement and feeling pretty stupid chanting, drawing circles and burning incense in your room (which may take a while), you may get to point where you slowly convince yourself to believe. That is, if you are serious about it. And it's also pretty fun.