You can deactivate it, but has to be on every car start. It's so annoying having to tur off all that crap every single trip.
Sometimes i forget the lane assist ON and get nudged randomly at high speeds, so so scary.
Time to start jailbreaking car software
Those nudges are gentle and totally safe in every car I've ever had. And no "random" nudges outside road construction work with dubious lane markings where you need to have a grip on the wheel anyway. A regular firm grip always overrides lane keeping.
Maybe you'll be able to buy a box to plug into the CAN bus and simulate pressing the button to deactivate it. Sorta like the auto-stop eliminator for that horrid feature (which saves less than 5 gallons of gas per year in my dad's Subaru - thankfully mine is one year too old for that).