Originally in Greek or Latin "science" (episteme / scientia) just meant demonstrable knowledge of any kind. So theology was also considered a science in medieval thinking, even though it was based on knowledge revealed by God, not discovered through inquiry into nature.I remember an article I read a good while ago that was basically some lefty whining about how the right thinks science means the method and not the institution (guys in white lab coats).
Now by "science" all they mean is "official medical propaganda," which has to pretend to be not just demonstrable, but self-evident, so they can insist you have a moral compulsion to believe it. That's why mainstream news outlets have articles saying that it's dangerous to let someone first investigate on their own and weigh different viewpoints before accepting "the science" about vaccines (which, unlike Christian theology, changes every few months or weeks). Only the willfully, and thus culpably ignorant reject the self-evident. So rather than debating us, we must be coerced, through fines, exclusion from basic activities, social stigmatisation.
The Soviets claimed that the state-approved version of Marxist ideology, which might however change to meet the political demands of the day, was "science." Not much difference.