Tropical pitcher plants (Nepenthes) do make decent houseplants, although they struggle through the dry indoor Canadian winters here. They do seem to capture a lot of the fungus gnats I've been fighting with lately (I can see dozens and dozens in each pitcher), but not nearly enough to make a noticeable difference.
So yeah, they absolutely grow wild but aren't an extremely prolific plant, best places to see them are usually near bogs and ponds.
I put the VFT outside once for it to snack and it ate a slug. Would have loved to see the look on the slugs face when the plant bit back.
Mine even survive on tap water which goes against advice, but I guess Scotlands tap water is different from most places. Just keep them in an inch of water the whole time, easiest plants ever.
When I was a child, I liked lizards, rats, and frogs as pets, and I also enjoyed the occasional Venus Flytrap from the nursery. I considered some pitcher plants recently, but I had to weigh their effectiveness against cockroaches, and the need to build a whole tropical environment with lights, heat and humidity.
Lastly, that brand of essential oil is the same one I purchase, and it's great. I use them in a diffuser.