I can understand calling theologians philosophers but being a philosopher does not make you a scientist.
Nothing “makes” you anything. Questioning and exploring existence can look very different in different ages.
Okay you haven’t been very explanatory about your statement that theologians were scientists. But it seems you are using the term extremely loosely to mean anyone who explores questions.
This is not my definition at all. Science is a method of exploring questions that involves hypotheses and tests and building principles from observed results. Theologians do none of that and never did. They made shit up. That is not science.