It is natural because our worldview affects how we reason. Also it marks what is important to us and what questions we ask. Theology addresses our questions.Many factors interactively affect one’s worldview and theology, often subconsciously, e.g., language, culture, education, gender, age, personality, life experience, etc.
There is no way, IMO, that Calvinism would have been born were Calvin trained as a theologian rather than a lawyer. That does not make it wrong, but it addresses justice by addressing issues unique to that period in Western history.