I prefer this view. Limiting the definition of cults to "small" or "based around a person" is missing the point that all religions are self-preserving in-groups that offer "truths" that will limit your worldview by excluding others, and practices that differentiate followers behaviorally.

But also beliefs can be useful. For example, the idea of an afterlife or reincarnation can help reduce the fear of death. The belief of forgiveness for sins, can offer redemption. That random events have meaning. That we are not alone when we are alone. All cognitively useful and therapeutic.

Opposing beliefs can be held at the same time. I can know that probabilistically, or based on personal experience, or empirical evidence, that death is either an ending or an unknowable, and still choose to believe in reincarnation because it does give more meaning to my actions and reduce fear of death.

And cult practices are often as good for the individual as the beliefs. Having community and regular social interaction is critical to human health. Conducting rituals and ceremonies give structure, meaning and comfort to the parts of our days and lives. Praying and meditating. Charity and service and on and on. These are all useful, healthy to the individual and to society.

When we can learn to adopt these things without closing our minds to other worldviews and possibilities, without in-group fear and defensiveness, without superiority and proselytization we'll be in a better world that's still full of cults