I doubt that the median adult in any country would have a grasp of core concepts of physics, chemistry and biology. Yes, everyone hears about it in school, and then they forget; and that knowledge gets replaced by the pseudoscience babble oozing from mass media and from phonies selling things like homeopathy, creationism, antivaxx, chemtrail, astrology, aliens, conspiracies and such. Exposure to these undermines people’s ability to ground their world view in scientific principles.
You may remember your science education because you are in a stem field and your everyday way of thinking is grounded in science. But that doesn’t mean everyone else does too. Don’t fall into the “common knowledge is whatever I know“ fallacy.