Thinking in systems, complex emergent behaviors, networks and graphs, category theory... are all very powerful cognitive tools. They are not explored in basic education and people stumble upon these concepts in college, during masters, and get a boost in their analytical skills. They were all popular objects of popular science writing over different decades and generated some hand wavy "theory of everything" marketing for books. They are quite useful, if a bit overblown in their own little hype context.