As an European outdoor enthusiast ... I have never been in a situation where I needed a machete instead of just going a slightly different path. Are American forests darker versions of Fangorn?
Obviously, if you're a visitor on a public trail, you shouldn't have a machete.
But there are corners of my property where a machete wouldn't hurt. Sure, New England forests often have open understories. But if sunlight can reach the ground, they can also be nearly impassible.
Weight of machete on hike >>> equivalent weight of water on hike, seems like a much better idea.