>>58229382Likely because it's hard to guard against aerial attacks, look at the sheer velocity and power behind a falcon's punch, a FALCON PUNCH if you will.
Fighting types are all about discipline and composure, they are wholly unguarded against the power of the mind and mastery of the wind, they may cleave a mountain, but the mind outwits muscles and might matters little when facing a tempestuous gale.
It may also involve some esoteric vision of the body, mind and soul in certain Asian philosophies and religions, with the body (Fighting type) being relegated to a representation of the earth, while the mind that sits above it (Psychic and Flying) represent the sky and the beyond.
