Ignorance snuck into public schools a long time ago!
Most graduates of public schools are woefully ignorant of the sciences in general. But they muddle through life anyway, since much of the details of science matter little in day to day life. The science that does perhaps matter most - economics - is rarely taught in public K-12 schools to any significant extent. If it were the graduates of those schools would be far less likely to support liberal political candidates.
If it was a science it would be called econology