system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are snakes evolving to not use their venom?

I was watching this documentary on venom and it said snakes are evolving to not use their venom. The thing that allows them survive in a world full of other predators. This sounds utterly insane to me.
gpt
Venom isn't free; it takes material to make venom. If a snake can make a kill without venom, then it's a waste to use venom to kill the prey. If enough snakes are successful without using venom, then the number of snakes that don't use venom will grow compared to those that do use venom, since they'd have comparable success but use less resources.