Religion is ubiquitous and universal in human culture (in some form for hundreds of thousands of years). Anthropologically that suggests it's a pretty significant component of evolved human behavior.
It's only after the enlightenment that we get any notion of the possibility that it's all nonsense.
The question really isn't one of belief - it must be one of evolution. Religion must have provided a substantial evolutionary advantage otherwise it couldn't have existed at all.
The majority of people who have ever existed would have followed religious forms because they would not have had any alternative and simply conformed to the social norms of the time and place they happened to have been born in.
It's no different for people today - the norm says 'work 8 hours a day helping this company make money for shareholders' - and people go along with it; even though it's completely pointless and irrational.
Everything we do is irrational - if we were rational we would immediately see how insignificant and pointless our personal existence is (based on the facts that make it clear that we are trivial specs of dust in an infinite universe - our actions are hopeless and irrelevant and arbitrary) and kill ourselves.
People do not live their lives rationally - they are driven by the genetic imperative to survive. If religion means survival then religion is the way to go.

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+1