I always thought that everyone born are admitted in the academy and there, they learn how to use their chakra and rise through the ranks and become a ninja similar to schools and education in real life. The Academy students were trained and prepared for life as a shinobi. Is this true? Is it mandatory for all humans in Narutoverse to admit in the academy and be a ninja?
We see quite some non-shinobi professions, for e.g.Teuchi becoming a Ramen chef. Just like my above assumption, did he once admitted in the academy in the childhood but choose to become a ramen chef?
Is it mandatory to for all to take admission in the academy and learn the basic elementary jutsus and experience the initial life of a ninja before becoming something else?