Anecdotally, I've heard people say they almost got into a crash because of lane assist, especially with the white/yellow temporary lines. But that does depend a ton on the car.

I have to agree that if you have to turn, you should be able to turn, lane assist be damned - we're not yet at the level where a car can accurately judge 100% of the road situations. But it's probably a good thing we're moving into a future where crossing lanes without turn signals feels like a virtual bump on the road.