While some snakes are highly dangerous due to venom or constriction, the vast majority are harmless and will only bite defensively when threatened, cornered, or handled. Globally, only about 15-20% of species are venomous
Scientifically, a human cannot physically transform into a snake. Biologically, the two species are entirely different, and no known medical process can alter a person's DNA, or organs to turn them into a reptile.
While physicaly vulnerable compared to many apex predators, humanity's high intelligence, tool use, and cooperative nature make us the dominant - and often the most destructive force on the planet.