The American school system is not here to educate us or to encourage us to learn; it's here to keep us in line and silent. It's here to keep us from deviating and being our own people and forming our own ideas.
A human finger would not be able to withstand the blast of explosive gun powder. Most grown humans fingers wouldn't fit in a 'shoot hole'. Don't take life advice from someone who calls the barrel of a gun a 'shoot hole'.