system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come bottled water is such a hot commodity while other animals can still drink water from unfiltered lakes and rivers?

I understand that pure water = good for you, however why do we place such a high priority for it when any other mammal can drink lake water without any repercussions?
gpt
Wild animals have lots of parasites and DO face serious repercussions. There's a reason the animals in zoos live longer and grow bigger than in the wild, and it's not just that they have no predators. Try adopting a stray dog right when it arrives in the shelter; they're full of parasites and need a LOT of medicine to get healthy.

Also, you've lived your whole life on clean food and water. Your gut is full of friendly, weak bacteria, unadapted to killing off parasites. If you drank contaminated water, you'd build up some degree of resistance as your bacterial flora adapt. But even that won't save you from tapeworms and the like.