When we see a stream, we are tempted to drink the crystal clear water, but after we quench our thirst we will start thinking if the water we drank was safe ? well we need to trust and drink.
Same way many places have very good groundwater sources, they look crystal clear, but we do not know if it is safe to drink, leaving these questions many people usually opt for packaged drinking water, due to commercialization and the power of social media we see a lot of mind changing advertisements which carry powerful message and make us carry a plastic pouch or a bottle when we commute to store water or to consume.
This is in practice since few decades, which has made us think that this is the only possible method, but we should also start analyzing if the method chosen is right or does it have any negative impact?