Nothing is 'just something to believe in'. I think it has often been suggested that that our beliefs are the most important things about us as we make our way through life.

Even beliefs we specifically reject for ourselves may the bedrock of another's life, maybe even foundation of their sanity.

The problem of belief happens when a doctrine is imposed on others, often for their own good. It is indeed true that 'the way to hell is paved with good intentions". However for that aphorism to succeed you would probably have to believe in the existence of hell!