What if their arms are just really weak, you do have to turn the wheel slightly more than normal.
If their arms are so weak as to be unable to overpower the lane-assist nudge, I really hope for everyone’s sake, that they are not behind the wheel of a moving vehicle. The ‘nudge’ isn’t strong in any sense of the word. You can overpower it with two fingers if squeezed tight. My semi truck had lane and steer assist, which nudged a little harder to steer the truck back into the lane, but that, too, could be overcome with a tight two-fingers grip.