Chris- I also have a 2017 Niro LX with Adv. Tech pkg. I think the issue might be that in the US, it's a LDW(lane departure warning). In Europe and maybe other places, it is a LKAS(lane keeping assist system). Ours gives you the three beeps, the other actually nudges the wheel. The LKAS sytem or Tech pkg. might also have an auto hi/low beam, but our LX's do not.
I for one am glad there's no LKAS. I live in a rural place with roads that have uneven or changed white border lines, and I'm constantly hearing the 3 beeps. It's not enoying enough to turn off, but I would if it was moving the wheel too. I think the best use is on a wider highway or interstate, where it's easier to stay within stripes. Although anymore, most highways have the built in pavement serrations at the edge that make the tire noise if you go too far over.